I have an unusual issue. I have recently had to reinstall mutt (actually my whole operating system). I had all of my config files saved, so I relatively painlessly was able to get all of my software back up to date. However, when I run mutt now (this had never been a problem before), scrolling through my email is slow, but only for some emails. I one point I thought that it was an message not marked with the F flag (i.e. from myself which I sent to test), but occasionally other emails scroll normally as well. I am completely baffled. I download the email with offlineimap, which still works well, so I do not believe this to be the problem. Any help would be greatly appreciated.