Not sure what is causing this, but I have tried the new solo_Collatz on two separate days now, and both times the WUs immediately error out on my HD 5870. It will crunch the regular Collatz just fine. If there's any similarities between the two projects, it errored out Donate WUs immediately too, although I was told that could have been Donate's server problem. It runs every other GPU project just fine.

The new Solo_collatz seems to be working on the one nVidia card I have, so it must be something with that HD 5870 - driver? Settings? Not sure...
Any suggestions?
Thanks for your time.