I've been having troubles with ethpool for quite some time now:
I have 3 rigs running @ 150MHs in total.
However, I only reach about 130-135 because there seem to be problems with the connection. Every miner only runs for some minutes/seconds at full speed before it keeps telling me WAITING FOR WORKPACKAGE. After 20 seconds or so, it finds a work package again and keeps mining.
Any ideas? Is this normal? Never had these problems about a month ago