Due to the refactoring of the @IssuesController@, @IssuesController#reply@ has been moved into @JournalsController#new@ in r3941. During this specific refactoring one LOC(Line Of Code) has been forgotten to be changed according to the new controller-schema.
This fault causes that issue description's quote-button is not showing up in the UI.

I've been able to patch this defect using the following change (which I won't upload as a seperate patch-file due to its size :):

Index: app/views/issues/show.rhtml
===================================================================
--- app/views/issues/show.rhtml (revision 4515)
+++ app/views/issues/show.rhtml (working copy)
@@ -49,7 +49,7 @@
 

 <% if @issue.description? %>
        

-       <%= link_to_remote_if_authorized(l(:button_quote), { :url => {:action => 'reply', :id => @issue} }, :class => 'icon icon-comment') %>
+       <%= link_to_remote_if_authorized(l(:button_quote), { :url => {:controller => 'journals', :action => 'new', :id => @issue} }, :class => 'icon icon-comment') %>
        

        
<%=l(:field_description)%>

Since this (small) issue is affecting current stable branch (actually, it's introduced in Redmine 1.0.1) I've set the target version to 1.0.5. Please correct it if necessary...