kdevelop cmake-gui broke in last day or two - no libQtGui.so.4?? (I didn't delete it...)

Guys, cmake-gui in Trinity broke within just the last day or so. I know, because I was running it not 2 days ago. I went to start it tonight and got the following error: cmake-gui: error while loading shared libraries: libQtGui.so.4: cannot open shared object file: No such file or directory. Huh? It was just working one or two rebuilds ago. I have confirmed on both i686 and x86_64. I haven't changed anything in the way I'm building it. So something is amiss. I've grepped the package lists for 'libQtG' and there is none to be found in any of the packages. I'm guessing it is supposed to be provided by Qt3, but I've looked at that package list and there is no libQtG anything. I'm perplexed and where this problem lies -- or what I did to create it? Help? Let me know if you want a bug report. Thanks. -- David C. Rankin, J.D.,P.E.