The sidebar next to each question shows miscellaneous related/unrelated questions. On Server Fault, it's clear which of those have accepted answers, because there's a box around the vote count:
Here there's no way to tell:
The Server Fault styling looks pretty much the same as on the main page, so we could do the same too -- mark posts with accepted answered green, unanswered gray. This would improve readability of the site and make things easier.