Running twiki 4.1.2, I got the TWikiUmlPlugin zip file and uploaded to server. When I enable the plugin via configure page, my entire left column menu disappears, although the empty column remains (content disappears).
I verified this by enabling and disabling just this plugin several times.
If you answer a question - or have a question you asked answered by someone - please remember to edit the page and set the status to answered. The status is in a drop-down list below the edit box.
Sorry, closing this after more than 30 days. Please try in the TWikiUmlPluginDev topic...
-- PeterThoeny - 06 Jul 2007