Bug in oclHashcat-plus-0.15b23?
per@stor:~/programmer/oclHashcat-plus-0.15$ ./oclExample0.sh
oclHashcat-plus v0.15 by atom starting...

Hashes: 6494 total, 1 unique salts, 6494 unique digests
Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes
Workload: 256 loops, 80 accel
Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger set to 80c
Device #1: Tahiti, 2048MB, 1050Mhz, 32MCU
Device #1: Kernel ./kernels/4098/m0000_a1.Tahiti_1124.2_1124.2 (VM).kernel (81152 bytes)
Device #1: Kernel ./kernels/4098/markov_le_plus_v1.Tahiti_1124.2_1124.2 (VM).kernel (88664 bytes)
Device #1: Kernel ./kernels/4098/bzero.Tahiti_1124.2_1124.2 (VM).kernel (30456 bytes)
ERROR: clSetKernelArg() -51

oclExample 400 + 500 works as expected. Single 7970, Ubuntu 12.04x64.
Turned out it was just a bug in my head. Extracting new beta on top of old beta causes problems, period. Thx epixoip!