Comment 4 for bug 227928

well, after some testing i found out that the bug is not hard to reproduce at all, so it's not quite as uncommon as i have thought, and so i guess it could be quite annoying for some people.
steps to reproduce:
1. uncover a tile and find out where the mines around it are.
2. flag all but one of the mines as normal (preferably leave one that is on a tile with a common edge with the uncovered tile, to make step 3 easier).
3. flag the remaining mine and IMMEDIATELY left-click the chosen uncovered tile. the mine will explode despite having been flagged before, even if there are no tiles to uncover. if you don't make it on the first try, you can just unflag it and try again.