release 0.15 froze

[blazer]

Came across a strange issue

Running SHA1 combo attack with a small left list and a large right list

3/4 of the way through it froze. System didn't freeze but the process oclhashcat process did.

GPUs were not at full load since it was tuned to 8 from 80 as there wasn't enough work from the left list.

Session.Name...: oclHashcat-plus
Status.........: Running
Input.Base.....: File (..\..\speciallist\search1.txt)
Input.Mod......: File (..\..\speciallist\blazer\06)
Hash.Target....: File (..\SHA1\hashes.txt)
Hash.Type......: SHA1
Time.Started...: Sun Aug 25 13:57:58 2013 (38 mins, 14 secs)
Time.Estimated.: Sun Aug 25 14:47:28 2013 (11 mins, 14 secs)
Speed.GPU.#1...: 1284.4 MH/s
Speed.GPU.#2...: 132.0 MH/s
Speed.GPU.#*...: 1416.4 MH/s
Recovered......: 91/859360 (0.01%) Digests, 0/1 (0.00%) Salts
Progress.......: 3328400373504/4307174416710 (77.28%)
Rejected.......: 0/3328400373504 (0.00%)
HWMon.GPU.#1...: 74% Util, 68c Temp, 87% Fan
HWMon.GPU.#2...: 85% Util, 46c Temp, 39% Fan

There is the spot it has frozen at.
Drivers: 13.4
Cards: 7970 + 5850

I know it's a bit vague but will post again if the issue arises again.