If I edit any page with PluginCatpath (90+% of my website), the editor window comes up blank. I can't tell if the problem is the plugin or the fact that I used a special character (») for the divider. I'm not aware of any page that has PluginCatpath with a normal character for the divider, or a page that uses special characters but does not have PluginCatpath. If I save the blank page and roll back to the previous version and edit again, then the editor window has all the text, as normal.
I'd report this as a bug, but it's not clear if the problem is due to the way in which I inserted the special character for PluginCatpath. See this thread for more on that: http://tiki.org/tiki-view_forum_thread.php?comments_parentId=50422&forumId=4
When I save the blank page and then roll back as described above, the special characters are also restored.