posts: display validation warnings in flash notice.

app/controllers/posts_controller.rb

@@ -110,6 +110,10 @@ private
   def respond_with_post_after_update(post)
     respond_with(post) do |format|
       format.html do
+        if post.warnings.any?
+          flash[:notice] = post.warnings.full_messages.join(".\n \n")
+        end
+
         if post.errors.any?
           @error_message = post.errors.full_messages.join("; ")
           render :template => "static/error", :status => 500

app/controllers/uploads_controller.rb

@@ -53,7 +53,12 @@ class UploadsController < ApplicationController
 
   def create
     @upload = Upload.create(params[:upload].merge(:server => Socket.gethostname))
-    @upload.process! if @upload.errors.empty?
+
+    if @upload.errors.empty?
+      post = @upload.process!
+      flash[:notice] = post.warnings.full_messages.join(".\n \n") if post.present? && post.warnings.any?
+    end
+
     save_recent_tags
     respond_with(@upload)
   end