Version is 2.6.19-rc6-git. System was more or less idle, just normal desktop 
stuff (copying single files by scp, writing mail). Don't know what exactly 
was working when this happened, I saw it some minutes later.

BUG: warning at fs/inotify.c:181/set_dentry_child_flags()
 [<c017da03>] set_dentry_child_flags+0xcf/0x11c
 [<c017daa3>] remove_watch_no_event+0x53/0x5f
 [<c017db91>] inotify_remove_watch_locked+0x12/0x3e
 [<c02896d7>] mutex_lock+0x1a/0x29
 [<c017de59>] inotify_rm_wd+0x6d/0x8a
 [<c017e322>] sys_inotify_rm_watch+0x38/0x4f
 [<c0102dcb>] syscall_call+0x7/0xb
 [<c028007b>] xfrm_policy_flush+0x10e/0x180
 =======================

Greetings,

Eike