Index: app/models/time_entry.rb
===================================================================
--- app/models/time_entry.rb	(revision 574)
+++ app/models/time_entry.rb	(working copy)
@@ -25,9 +25,8 @@
   
   attr_protected :project_id, :user_id, :tyear, :tmonth, :tweek
   
-  validates_presence_of :user_id, :activity_id, :project_id, :hours, :spent_on
+  validates_presence_of :user_id, :activity_id, :project_id, :hours, :spent_on, :comments
   validates_numericality_of :hours, :allow_nil => true
-  validates_length_of :comments, :maximum => 255
 
   def before_validation
     self.project = issue.project if issue && project.nil?
Index: app/views/timelog/details.rhtml
===================================================================
--- app/views/timelog/details.rhtml	(revision 574)
+++ app/views/timelog/details.rhtml	(working copy)
@@ -36,7 +36,7 @@
 	</div>
 	<% end %>
 </td>
-<td><%=h entry.comments %></td>
+<td><%= textilizable entry.comments %></td>
 <td align="center"><strong><%= entry.hours %></strong></td>
 <td align="center"><%= link_to_if_authorized(l(:button_edit), {:controller => 'timelog', :action => 'edit', :id => entry}, :class => "icon icon-edit") if entry.user_id == @owner_id %></td>
 </tr>
Index: app/views/timelog/edit.rhtml
===================================================================
--- app/views/timelog/edit.rhtml	(revision 574)
+++ app/views/timelog/edit.rhtml	(working copy)
@@ -7,7 +7,7 @@
 <p><%= f.text_field :issue_id, :size => 6 %> <em><%= h("#{@time_entry.issue.tracker.name} ##{@time_entry.issue.id}: #{@time_entry.issue.subject}") if @time_entry.issue %></em></p>
 <p><%= f.text_field :spent_on, :size => 10, :required => true %><%= calendar_for('time_entry_spent_on') %></p>
 <p><%= f.text_field :hours, :size => 6, :required => true %></p>
-<p><%= f.text_field :comments, :size => 100 %></p>
+<p><%= f.text_area :comments, :required => true, :cols => 60, :rows => 15, :class => 'wiki-edit' %></p>
 <p><%= f.select :activity_id, (@activities.collect {|p| [p.name, p.id]}), :required => true %></p>
 </div>
 
@@ -20,4 +20,6 @@
 <%= javascript_include_tag "calendar/lang/calendar-#{current_language}.js" %>
 <%= javascript_include_tag 'calendar/calendar-setup' %>
 <%= stylesheet_link_tag 'calendar' %>
-<% end %>
\ No newline at end of file
+<% end %>
+
+<%= wikitoolbar_for 'time_entry_comments' %>
\ No newline at end of file
Index: db/migrate/058_change_time_entries_comments.rb
===================================================================
--- db/migrate/058_change_time_entries_comments.rb	(revision 0)
+++ db/migrate/058_change_time_entries_comments.rb	(revision 0)
@@ -0,0 +1,9 @@
+class ChangeTimeEntriesComments < ActiveRecord::Migration
+  def self.up
+    change_column :time_entries, :comments, :text, :default => nil
+  end
+
+  def self.down
+    raise IrreversibleMigration
+  end
+end