In no particular order: Ghost models - models of mobiles that stay where you last spotted them and don't disappear until that mobile comes within viewing range again. Nothing like getting all hyped up for an assault only to find the character you are attacking isn't actually there. Ghost health bars - as you play the game the health bar buffer (?) collects health bars that aren't properly purged, so you end up with an assortment of health bars with various technical issues that don't disappear until you either spot the mobile again, or you log off. Crashing on logging off or closing client - this one is really pissing me off, it is happening at least 33% of the time for me. Client failing to load the UI properly after logging off and on. Pets with distinct graphics in the classic client that aren't recognized in the enhanced client - shortmane, longmane and "pure" black nightmares; "pure" white and off-white white wyrms, red and brown dragons. Craptastic frame rates - AMD Phenom II X4 955BE; 8 GB Corsair XMS DDR3; Sapphire Radeon 6770 with 1 GB DDR5; and I'm getting fps drops into the single digits with DX-9 graphics? Brutal... That's all I can think of for now. Please feel free to add your own issues.