KPA crashes on exit when the main window is deleted. The bug seems to come somewhere from ImageManager::ThumbnailCache::deleteInstance().
Git commit 7ab8b9109cb1a8e02ce04a1306b4a596c745b570 by Johannes Zarl. Committed on 24/08/2013 at 22:17. Pushed by johanneszarl into branch 'master'. Apply workaround for current crash-on-exit problem. M +2 -1 main.cpp http://commits.kde.org/kphotoalbum/7ab8b9109cb1a8e02ce04a1306b4a596c745b570
I've no idea why this happens (Doesn't for me, neither does valgrind complain about anything), but I committed a patch similar to this recently.