See the link above, I've many such unblock requests while patrolling [[CAT:RFU]]. I wasn't able to reproduce it at home, but it really seems that sometimes Block::load misses username blocks in favor of autoblocks.
Version: 1.20.x
Severity: normal
Whiteboard: aklapper-moreinfo
URL: http://en.wikipedia.org/w/index.php?title=User_talk:Staminal&oldid=140812737
I still see a lot of such occurencies - needs an investigation. Suspect a load from DB_SLAVE or something. May I also disagree with this bug's low importance because all users who see an autoblocked message request an unblock using an autoblock-specific template and thus get their requests declined. Not nice.
Max: Do you know if this is still a problem?
Plus wondering if bug 31403 maybe fixed this.
Unfortunately closing this report as no further information has been provided.
Max: Please feel free to reopen this report if you can provide the information asked for and if this still happens. Thanks!