Add support for USEPRO:  checkgroups scope, checkgroups serial numbers and accurate Content-Type: headers.
Ask for confirmation when "(Moderated)" is misplaced in a newsgroup description.
Remove the charset for a multipart/mixed block in newgroup articles, change the default serial number from 0 to 1 in checkgroups articles, allow the user to interactively modify his message (thanks to Matija Nalis for the idea).