This is a strange behaviour. while I was using TB, an error came up 'canvas does not allow drawing' and system froze. I restarted the system. opened TB, Nothing is visible on the screen except for the top file menu and bottom line. entire page is blank no folders, messages, icons , buttons nothing. I reinstalled TB but nothing. I am on Win 98 SE. Kindly advise urgently as all my mails are pending.