Version:           4.2.0-55.12-x86_64 (using KDE 4.2.0)
OS:                Linux
Installed from:    SuSE RPMs

Using openSUSE 11.1 64-bit, with the openSUSE KDE4.2 repositories enabled. The current package version for Lancelot is kde4-plasma-addons 4.2.0-55.12-x86_64


When I start up, the Lancelot application menu is blank, though computer,
contacts & documents are fine.  If I resize the open (blank) window then
Favorites & Applications menus appear, but clicking on a category in the
Applications list has no effect.  The "standard" menu system works fine.

I've tried removing every trace of Lancelot (config files, libraries, icons
...) and re-installing.  I've also tried switching desktop themes. Both have no
effect.  

I found a similar bug report for Mandriva:
http://www.nabble.com/-Bug-47729--NEW:-Lancelot-widget---blank-application-choices-menu-td21978790.html

Resolved bug 176428 relates a similar problem but not for Lancelot; however, the suggested fix @ Comment #4 doesn't work :-(