diff --git a/app/controllers/concerns/commentable_actions.rb b/app/controllers/concerns/commentable_actions.rb
index ef5e60dcb..ee69ac809 100644
--- a/app/controllers/concerns/commentable_actions.rb
+++ b/app/controllers/concerns/commentable_actions.rb
@@ -129,16 +129,16 @@ module CommentableActions
       when '4'
         1.year.ago
       else
-        Date.parse(params[:advanced_search][:date_min]) rescue nil
+        Date.parse(params[:advanced_search][:date_min]) rescue 100.years.ago
       end
     end
 
     def search_finish_date
-      params[:advanced_search][:date_max].try(:to_date) || Date.today
+      (params[:advanced_search][:date_max].to_date rescue Date.today) || Date.today
     end
 
     def search_date_range
-      search_start_date.beginning_of_day..search_finish_date.end_of_day
+      [100.years.ago, search_start_date].max.beginning_of_day..[search_finish_date, Date.today].min.end_of_day
     end
 
     def set_search_order
diff --git a/app/models/budget/investment.rb b/app/models/budget/investment.rb
index 99e0eb25a..4bfd038c3 100644
--- a/app/models/budget/investment.rb
+++ b/app/models/budget/investment.rb
@@ -25,6 +25,7 @@ class Budget
     validates :description, presence: true
     validates :heading_id, presence: true
     validates_presence_of :unfeasibility_explanation, if: :unfeasibility_explanation_required?
+    validates_presence_of :price, if: :price_required?
 
     validates :title, length: { in: 4..Budget::Investment.title_max_length }
     validates :description, length: { maximum: Budget::Investment.description_max_length }
@@ -136,6 +137,10 @@ class Budget
       unfeasible? && valuation_finished?
     end
 
+    def price_required?
+      feasible? && valuation_finished?
+    end
+
     def unfeasible_email_pending?
       unfeasible_email_sent_at.blank? && unfeasible? && valuation_finished?
     end
diff --git a/app/views/budgets/investments/_investment_show.html.erb b/app/views/budgets/investments/_investment_show.html.erb
index ebac39186..d97a1fbfb 100644
--- a/app/views/budgets/investments/_investment_show.html.erb
+++ b/app/views/budgets/investments/_investment_show.html.erb
@@ -103,7 +103,7 @@
       <div class="social-share-full">
         <%= social_share_button_tag("#{investment.title} #{setting['twitter_hashtag']}") %>
         <% if browser.device.mobile? %>
-          <a href="whatsapp://send?text=<%= investment.title %> <%= budget_investment_url(budget_id: investment.budget_id, id: investment.id) %>" data-action="share/whatsapp/share">
+          <a href="whatsapp://send?text=<%= investment.title.gsub(/\s/, '&nbsp;') %>&nbsp;<%= budget_investment_url(budget_id: investment.budget_id, id: investment.id) %>" data-action="share/whatsapp/share">
             <span class="icon-whatsapp whatsapp"></span>
             <span class="sr-only"><%= t("social.whatsapp") %></span>
           </a>
diff --git a/app/views/debates/show.html.erb b/app/views/debates/show.html.erb
index 096369bc3..64eafc0ae 100644
--- a/app/views/debates/show.html.erb
+++ b/app/views/debates/show.html.erb
@@ -53,7 +53,7 @@
         <div class="social-share-full">
           <%= social_share_button_tag("#{@debate.title} #{setting['twitter_hashtag']}") %>
           <% if browser.device.mobile? %>
-            <a href="whatsapp://send?text=<%= @debate.title %> <%= debate_url(@debate) %>" data-action="share/whatsapp/share">
+            <a href="whatsapp://send?text=<%= @debate.title.gsub(/\s/, '&nbsp;') %>&nbsp;<%= debate_url(@debate) %>" data-action="share/whatsapp/share">
               <span class="icon-whatsapp whatsapp"></span>
               <span class="sr-only"><%= t("social.whatsapp") %></span>
             </a>
diff --git a/app/views/proposals/show.html.erb b/app/views/proposals/show.html.erb
index 5d184088d..af1173286 100644
--- a/app/views/proposals/show.html.erb
+++ b/app/views/proposals/show.html.erb
@@ -126,7 +126,7 @@
         <div class="social-share-full">
           <%= social_share_button_tag("#{@proposal.title} #{setting['twitter_hashtag']}") %>
           <% if browser.device.mobile? %>
-            <a href="whatsapp://send?text=<%= @proposal.title %> <%= proposal_url(@proposal) %>" data-action="share/whatsapp/share">
+            <a href="whatsapp://send?text=<%= @proposal.title.gsub(/\s/, '&nbsp;') %>&nbsp;<%= proposal_url(@proposal) %>" data-action="share/whatsapp/share">
               <span class="icon-whatsapp whatsapp"></span>
               <span class="sr-only"><%= t("social.whatsapp") %></span>
             </a>
diff --git a/app/views/spending_proposals/show.html.erb b/app/views/spending_proposals/show.html.erb
index 4cdfb688b..4c5a041d3 100644
--- a/app/views/spending_proposals/show.html.erb
+++ b/app/views/spending_proposals/show.html.erb
@@ -45,7 +45,7 @@
       <div class="social-share-full">
         <%= social_share_button_tag("#{@spending_proposal.title} #{setting['twitter_hashtag']}") %>
         <% if browser.device.mobile? %>
-          <a href="whatsapp://send?text=<%= @spending_proposal.title %> <%= spending_proposal_url(@spending_proposal) %>" data-action="share/whatsapp/share">
+          <a href="whatsapp://send?text=<%= @spending_proposal.title.gsub(/\s/, '&nbsp;') %>&nbsp;<%= spending_proposal_url(@spending_proposal) %>" data-action="share/whatsapp/share">
             <span class="icon-whatsapp whatsapp"></span>
             <span class="sr-only"><%= t("social.whatsapp") %></span>
           </a>
diff --git a/spec/features/debates_spec.rb b/spec/features/debates_spec.rb
index f16f416bf..bc01c94e2 100644
--- a/spec/features/debates_spec.rb
+++ b/spec/features/debates_spec.rb
@@ -640,6 +640,28 @@ feature 'Debates' do
           end
         end
 
+        scenario "Search by custom invalid date range", :js do
+          debate1 = create(:debate, created_at: 2.years.ago)
+          debate2 = create(:debate, created_at: 3.days.ago)
+          debate3 = create(:debate, created_at: 9.days.ago)
+
+          visit debates_path
+
+          click_link "Advanced search"
+          select "Customized", from: "js-advanced-search-date-min"
+          fill_in "advanced_search_date_min", with: "9"
+          fill_in "advanced_search_date_max", with: "444444444"
+          click_button "Filter"
+
+          within("#debates") do
+            expect(page).to have_css('.debate', count: 3)
+
+            expect(page).to have_content(debate1.title)
+            expect(page).to have_content(debate2.title)
+            expect(page).to have_content(debate3.title)
+          end
+        end
+
         scenario "Search by multiple filters", :js do
           ana  = create :user, official_level: 1
           john = create :user, official_level: 1
diff --git a/spec/features/proposals_spec.rb b/spec/features/proposals_spec.rb
index 18864dc9b..dbc5956cd 100644
--- a/spec/features/proposals_spec.rb
+++ b/spec/features/proposals_spec.rb
@@ -980,6 +980,28 @@ feature 'Proposals' do
           end
         end
 
+        scenario "Search by custom invalid date range", :js do
+          proposal1 = create(:proposal, created_at: 2.days.ago)
+          proposal2 = create(:proposal, created_at: 3.days.ago)
+          proposal3 = create(:proposal, created_at: 9.days.ago)
+
+          visit proposals_path
+
+          click_link "Advanced search"
+          select "Customized", from: "js-advanced-search-date-min"
+          fill_in "advanced_search_date_min", with: 4000.years.ago
+          fill_in "advanced_search_date_max", with: "wrong date"
+          click_button "Filter"
+
+          expect(page).to have_content("There are 3 citizen proposals")
+
+          within("#proposals") do
+            expect(page).to have_content(proposal1.title)
+            expect(page).to have_content(proposal2.title)
+            expect(page).to have_content(proposal3.title)
+          end
+        end
+
         scenario "Search by multiple filters", :js do
           ana  = create :user, official_level: 1
           john = create :user, official_level: 1
diff --git a/spec/models/budget/investment_spec.rb b/spec/models/budget/investment_spec.rb
index 3ab97c574..fa51f3cab 100644
--- a/spec/models/budget/investment_spec.rb
+++ b/spec/models/budget/investment_spec.rb
@@ -54,7 +54,7 @@ describe Budget::Investment do
     expect(investment.group_id).to eq group_2.id
   end
 
-  describe "#unfeasibility_explanation" do
+  describe "#unfeasibility_explanation blank" do
     it "should be valid if valuation not finished" do
       investment.unfeasibility_explanation = ""
       investment.valuation_finished = false
@@ -76,6 +76,29 @@ describe Budget::Investment do
     end
   end
 
+  describe "#price blank" do
+    it "should be valid if valuation not finished" do
+      investment.price = ""
+      investment.valuation_finished = false
+      expect(investment).to be_valid
+    end
+
+    it "should be valid if valuation finished and unfeasible" do
+      investment.price = ""
+      investment.unfeasibility_explanation = "reason"
+      investment.feasibility = "unfeasible"
+      investment.valuation_finished = true
+      expect(investment).to be_valid
+    end
+
+    it "should not be valid if valuation finished and feasible" do
+      investment.price = ""
+      investment.feasibility = "feasible"
+      investment.valuation_finished = true
+      expect(investment).to_not be_valid
+    end
+  end
+
   describe "#code" do
     let(:investment) { create(:budget_investment) }