If you have started to use Feedburner Socialize, here is something that could cause potential problems and piss your followers off. The service has its share of problems. According to Zoli, Feedburner will tweet your posts multiple times if you make edits to them, no matter how minor they are. This can be a real problem if you tend to make updates to posts after they have been published.
Of course, there is no documentation as to whether this is by design or it is a real bug, however, you have been warned. This is why we had also asked you whether it was too early to dump Twitterfeed after all.
Update: This bug has now been fixed according to a comment from a Google Feedburner employee.