Just noticed something in KDevelop Beta 1

[James Oakley]

You cannot delete a class by right clicking it in the classview (grayed
out). If you delete the files that contain it from the LFV tab and they
were open, they will still be in there under the window menu. If you
goto them from that menu you'll get a "File does not exist error" but
the filenames do not disappear from the menu.

Might want to make them disappear upon deletion or the error.

JFunk