Looking for an explanation

This morning I couldn't log in (KDE), but could log in at console. After a good deal of searching and experimentation I discovered that my /tmp had run out of space, and that my /tmp/kde-eddie was 689MB! Can anyone say why kde-eddie should have grown to that size? How can I prevent a reoccurrence? By removing kde-eddie I can log in now and everything seem fine (so far). Any thoughts, anyone? Thanks Eddie