Given the impending server move this weekend, Squeaky has warned that there may be some userpic loss and that they may need to be reuploaded.
![[info]](https://www.insanejournal.com/img/userinfo.gif)
sherlock has a reupload tool (and various other handy things)
posted here.
If you don't have your userpics backed up, go to
http://www.insanejournal.com/allpics.bml?user=[your user name here], File, save as, then double check that all images were downloaded.
helpful