One of my machines crashed this morning during no appearant activity:

Apr 28 06:26:14 joker kernel: Assertion failure in
journal_dirty_metadata() at transaction.c:1114: "jh->b_transaction !=
((void *)0)"
Apr 28 06:26:14 joker kernel: kernel BUG at transaction.c:1114!
Apr 28 06:26:14 joker kernel: invalid operand: 0000
Apr 28 06:26:14 joker kernel: CPU:    0
Apr 28 06:26:14 joker kernel: EIP:    0010:[<c0159f1b>]    Not tainted
Apr 28 06:26:14 joker kernel: EFLAGS: 00010282
Apr 28 06:26:14 joker kernel: eax: 0000006b   ebx: c4ecc5e0   ecx:
c0b00000   edx: c7c1d080
Apr 28 06:26:14 joker kernel: esi: c1b25f40   edi: c7f4d600   ebp:
c715e7e0   esp: c0b01e0c
Apr 28 06:26:14 joker kernel: ds: 0018   es: 0018   ss: 0018
Apr 28 06:26:14 joker kernel: Process find (pid: 22951,
stackpage=c0b01000)
Apr 28 06:26:14 joker kernel: Stack: c025a960 c025b14f c025a940
0000045a c025b180 c68853e0 c4f61ca8 c68852c0
Apr 28 06:26:14 joker kernel:        00000000 c7f4d694 c015358f
c1cb74a0 c715e7e0 c0b01e9c 00000000 c1cb74a0
Apr 28 06:26:14 joker kernel:        00000000 00000000 c715e7e0
c1cb74a0 c715e7e0 c0b01e9c c68852c0 c015391d
Apr 28 06:26:15 joker kernel: Call Trace:    [<c015358f>] [<c015391d>]
[<c0153a29>] [<c0153af7>] [<c013df82>]
Apr 28 06:26:15 joker kernel:   [<c013f413>] [<c014f6d0>] [<c0135040>]
[<c01350e7>] [<c01390ab>] [<c0139600>]
Apr 28 06:26:15 joker kernel:   [<c01397bb>] [<c0139600>] [<c0138a9b>]
[<c0106bd3>]
Apr 28 06:26:15 joker kernel:
Apr 28 06:26:15 joker kernel: Code: 0f 0b 5a 04 40 a9 25 c0 83 c4 14
8b 43 14 39 f0 0f 84 90 00

debian/woody 2.4.20 using ext3 fs'
Any hints?