We have just released
PhoenixMiner 5.0d that should fix the problem that some are experiencing when switching from ETC to ETH mining. You can find the download link and the checksums in the first post of this thread.
The new features in this release are:
- Fixed problem with crashing or slowing down when switching from ETC to ETH mining
Not fixed. Now, after switching from ETC to ETH, all shares become invalid.
I also have the same problem in the pool Crazypool.org, I put the -coin auto, but I still have the problem.