I've been updating each time in the current flurry :) of updates to YPOPs. Thanks for a creative and handy program! Just wanted to report that it's been working all along, but 0.9.5.1 seems to break something when used with Eudora 22.214.171.124.
I'm not sure exactly what's up -- my guess is a timing issue -- but it consistently gets errors when doing a regular email check alongside my other accounts. (I apologize for not getting the specific wording. There's a lot going on here right now and I've been a bit overwhelmed.)
When I check Yahoo by itself, 0.9.5.1 seems to work fine. However, for the time being I've rolled back to 0.9.2 which has been working consistently. I hope this is useful info.