Dumb question:

today I installed Xournal. Using Conky to track rootfs space because I enabled extras-testing, i noticed that free space dropped from 54 to 42 Mb.
I checked the non-opt space used with kwotsky's perl script, and as other used found, it reported 576k.
Is it perhaps some dependency that uses 12 megs of precious rootfs room???
Any clue?