I recently installed C7 from a C7+gnome CD. Gnome was awful enough that I promptly installed KDE.
KDE is not doing so well either. Text in text editors invoked by "opening" a file is flakey at best. E.g. pieces disappear and duplicate. Terminals seem ok, including vim invoked from the terminal. Firefox text seems ok. The sidebar text in file-browser windows often has "black tape" over it, usually completely covering text. The file names are ok.
Suggestions on how to dignose this?