IPB2 md5(md5($salt).md5($pass)) issue?

[hashfixer]

Results:

Code:

./oclHashcat-plus64.bin -m2811 test.txt tword.txt oclHashcat-plus v0.08 by atom starting... Hashes: 5 Unique salts: 5 Unique digests: 5 Bitmaps: 8 bits, 256 entries, 0x000000ff mask, 1024 bytes Rules: 1 GPU-Loops: 32 GPU-Accel: 40 Password lengths range: 1 - 15 Platform: AMD compatible platform found Watchdog: Temperature limit set to 90c Device #1: Cayman, 1024MB, 0Mhz, 22MCU Device #2: Cayman, 1024MB, 0Mhz, 22MCU Device #1: Allocating 132MB host-memory Device #1: Kernel ./kernels/4098/m2810_a0.Cayman.64.kernel (1110704 bytes) Device #2: Allocating 132MB host-memory Device #2: Kernel ./kernels/4098/m2810_a0.Cayman.64.kernel (1110704 bytes) Scanned dictionary tword.txt: 41 bytes, 6 words, 6 keyspace, starting attack... Status.......: Exhausted Input.Mode...: File (tword.txt) Hash.Target..: File (test.txt) Hash.Type....: IPB2+, MyBB1.2+ Time.Running.: 1 sec Time.Left....: 0 secs Time.Util....: 1000.7ms/0.0ms Real/CPU, 0.0% idle Speed........: 25 c/s Real, 0 c/s GPU Recovered....: 0/5 Digests, 0/5 Salts Progress.....: 30/30 (100.00%) Rejected.....: 5/30 (16.67%) HW.Monitor.#1: 0% GPU, 45c Temp HW.Monitor.#2: 0% GPU, 37c Temp Started: Tue May 15 18:58:14 2012 Stopped: Tue May 15 18:58:15 2012

Could this be a bad driver issue? I'm running Catalyst Version 12.4 under ubuntu 12.04 with two ATI HD 6950 cards not in cross fire.