I guess I'm one of the happy miners today.
I did the upgrade to 5.8b yesterday. My speed increased from 166.25 to 166.683 MH/s
Not a big gain but it is an improvement and I like it. No issues at all so far.
Been running 24 hrs.
DANGER! DANGER! DANGER!
There is *NO* version 5.8b of PhoenixMiner.
If you have downloaded and installed it delete it *NOW* and scan your computer for virusus.
Only download from the links posted on the 1st page of this forum - all others are fake.
Version 5.7b is the current version