Version:           unspecified (using KDE 4.5.3) 
OS:                Linux

When right clicking on the title bar, there is a 'move window to group' option, hovering on this pops-up a list of windows/groups. However, kwin doesn't truncate the length of a window title. This means that if you get a window with a very long name (eg an open skype chat conversation where the whole first paragraph of the conversation is included in the title, but basically any file with a very long name), the pop-up can cover the whole width of the screen. This means that options lower in the menu (eg 'Advanced') are impossible to access as focus jumps to the pop-up window list.

Kwin should truncate window names at say 40 characters or similar.

Reproducible: Always

Steps to Reproduce:
Create a file (eg a pdf) with a REALLY long name.
Open file in appropriate programme (eg okular)
Right click on the title bar on any window and scroll down the menu to 'move window to group'.