The problem pretty much sums itself up in the title.
Whenever I try to open the in-game mail, the game freezes for an unforeseeable amount of time. When trying to click somewhere, it crashes and closes the game.
This is getting pretty annoying, so to say ._.
And it's not just mail. I tried switching weapons and armour in the arcade - it took me ten minutes because the game kept on freezing up. Naturally, the last thing I tried switching crashed the game. Little things like mail-reading and equipping items shouldn't cause massive lag attacks. >:(
Don't worry, will be fixed in 33 days after all your e-mails with the money from auctions in them will be automatically deleted :D