Version:           unspecified (using KDE 4.5.5) 
OS:                Linux

dbus-daemon hits 1024 file descriptors fairly frequently (and thus wedges up several other things).  Generally I log out and back in to start a new dbus-daemon, but I've discovered that kpackagekiticon also had almost 1000 fds, and killing it reduced dbus-daemon's open fds by about that number, to below 100:

cd /proc; do echo $i `ls $i/fd 2>/dev/null|wc`;done | awk '$2 > 300 { print $0 }'
2886 1024 1024 4010   # dbus-daemon, see below
3960 959 959 3726     # kpackagekiticon, see below

user   3960     1  0 Feb08 ?        00:00:25 /usr/libexec/kde4/kpackagekitsmarticon
user   2886     1 13 Feb08 ?        15:24:39 /bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session

[root@host proc]# kill 3960
[root@host proc]# kill 3960
bash: kill: (3960) - No such process
[root@host proc]# uptime
 08:36:10 up 4 days, 14:27, 10 users,  load average: 0.49, 0.86, 1.29
[root@host proc]# ls /proc/2886/fd | wc   # dbus-daemon now many fewer fds open
     80      80     232

RPM versions are:
dbus-1.4.0-2.fc14.x86_64
kpackagekit-0.6.3.3-1.fc14.x86_64

Reproducible: Always

Steps to Reproduce:
Reproducibility of many-fds in dbus-daemon "happens every time".  This is the first time I've killed kpackagekiticon to fix it, but it was a pretty definite fix.

Actual Results:  
Normal desktop use ~4days, dbus-daemon open fds goes to 1024 (mostly sockets in /tmp/dbus[stuff]), kpackagekiticon open fds goes to nearly 1000.  Kill kpackagekiticon, dbus-daemon back to normal.


I've been a Linux sysadmin for a long time and this is my personal desktop.  You can ask me to try fairly odd things :-) (debug package?  restart kpackagekiticon and strace it?).