Apple Thoughts: Problems with Apple Mail Program

"Something seems rotten, at least for some Mac users, with the Apple Mail program. Apple support boards are lighting up with reports of email messages being downloaded multiple times."

Several threads in the Apple forums, one here and one here, outlining some dismay over the problem in the Mail program. Mainly happening to POP accounts, with some reports it is happening to IMAP accounts, that mail messages are not being deleted and re-downloading the next time you check your mail. This started with the 10.6.1 update, but I haven't seen the behavior with mine, however I do have mine set up as IMAP. Is it happening to you, or are you using the Apple Mail program? If you don't use Mail, what program do you use for your email?