The tracker for JOSM bugs in http://trac.openstreetmap.org has moved and merged into the one at ..
In the past, two trackers existed and both are now merged to reduce the number of places to look for new bugs ;). Unfortunatly I cannot close the existing bugs at trac.openstreetmap.org – there is a (temporary?) problem with the server and I am not able to login.
So for future bug reporting, use josm.eigenheimstrasse.de
Ciao, Imi.