DanRaisch wrote:Actually, no; that's not what it means. It actually means that on some machines, two of the most common AV programs in use today conflict with Thunderbird. It's not up to an email client to ensure compatibility with AV products. That's backwards. It's up to the AV program publishers to ensure that their latest versions work properly with popular productivity applications, like word processors, email clients, spreadsheets, etc. Norton has been a bit better lately than it was a short time ago but McAfee has a bad reputation on these forums and is often found to be causing the problems that folks post here about, particularly performance issues with Firefox or Thunderbird.
Just because they are popular AV products does not mean they work properly and play nice with everything. They are in the business to make money, and the more features they throw in the better they look. But many of these features cause problems. See
https://wiki.mozilla.org/Thunderbird:Te ... nce_Issues (and McAfee in particular). One day they are performant, and the next day that are not. At various times in their versions/life cycles they interoperate well, and next thing you know they've broken or regressed something.
That said, Thunderbird version 38 goes into testing soon, and it has several good performance improvements.