quota not working (segfault)

[Marc <debian@roth.lu>]

Since the upgrade from sarge to etch the following appears regularly in
my logs

...
quota[3345]: segfault at 00000000ffff8100 rip 000000000804ba4d rsp
00000000ff976c50 error 6
quota[2647]: segfault at 00000000ffff8100 rip 000000000804ba4d rsp
00000000ffe6a140 error 6
quota[24912]: segfault at 00000000ffff8100 rip 000000000804ba4d rsp
00000000ff843b20 error 6
quota[17277]: segfault at 00000000ffff8100 rip 000000000804ba4d rsp
00000000ffd117e0 error 6
...

Since I use the quota command in several regularly running scripts this
is no surprise. So, why is it not working? Running it manually gives:

# quota -g web8 -v
quota: error while getting quota from /dev/md2 for web8 (id 10008): Success

repquota and quotatool do actually work:

# quotatool -g web8 /dev/md2 -d
10008 /dev/md2 7616444 15360000 30720000 0 236735 0 0 0

Does anyone have an idea?
Regards,
Marc