The September 25th update discusses fixes to dungeons:
https://forum-en.guildwars2.com/forum/info/news/Update-Notes-September-25th-2012
A couple of quotes:
"Updated vendors in the Ascalonian Catacombs and Caudecus’s Manor to sell level 80 versions of their unique skins rather than level 60 and 70. Players who purchased the level 60 and 70 versions will soon be given the opportunity to upgrade those to level 80 without having to use transmutation stones."
"All of these changes have been the result of an original exploit which was letting players receive upwards of 20 levels by completing a single dungeon run. We initially closed this exploit, which caused some new problems. The result is this new system which should increase dungeon rewards for players who play though them normally but help curb inflation of rewards for those who are using exploitative methods to farm them."
The rest too long to quote here.
https://forum-en.guildwars2.com/forum/info/news/Update-Notes-September-25th-2012
A couple of quotes:
"Updated vendors in the Ascalonian Catacombs and Caudecus’s Manor to sell level 80 versions of their unique skins rather than level 60 and 70. Players who purchased the level 60 and 70 versions will soon be given the opportunity to upgrade those to level 80 without having to use transmutation stones."
"All of these changes have been the result of an original exploit which was letting players receive upwards of 20 levels by completing a single dungeon run. We initially closed this exploit, which caused some new problems. The result is this new system which should increase dungeon rewards for players who play though them normally but help curb inflation of rewards for those who are using exploitative methods to farm them."
The rest too long to quote here.