It might be because I completed the port of KIconLoader to use the KSharedDataCache class I recently introduced.
Everything should be fine if it’s not broken yet though, as Plasma was ported over a few days ago.
The cache files are stored under $(kde4-config –path cache)/*.kcache (Normally this is /var/tmp/kdecache-$USER/*.kcache). You shouldn’t need the old plasma_theme*.index or plasma_theme*.data files anymore, and you can delete those if you’d like.
I’m not done with the series I had going on making KSharedDataCache, I just haven’t had a lot of time recently. There’s 1 or 2 more parts I’d like to add, stay tuned…