I tried everything and I'm getting mixed results.
Whispersync will either:
1- Not work at all between the 3 devices (PW2, iPhone, iPad) or...
2- Work between the iOS devices but not with the PW2 or...
3- Work fine between all 3 devices
I still can't pinpoint the problem.
One thing I got used to do is cleaning the EPUBs before converting them to MOBI. I use the
Modify ePub plugin with the following settings:
Am I stripping something that might be preventing Whispersync from working correctly?