Thanks for stabbing, Brian. I'd despaired of getting a reply, so deleted all of the emails that were on the server (from the 30 January onwards) and didn't change anything else and there is no problem at the moment (FLW - famous last words, if it isn't a standard abbreviation)

Using v4.70.

I have Pegasus on my main PC and have it set to only download new mail (I do this so I can also download on to a tablet etc directly from the email server using a different emailer) and it has done this with no problem for several weeks. However, it has recently started downloading the whole set of emails ((both new and previously downloaded) about once a day, while the rest of the day, it works as expected. I've not noticed any special time of day this occurs, Any ideas?

No takers after 5 days? 

Guess there aren't any takers so I'll take a stab...

Multiple identities with one of them configured to download all mail?