Not that it helps your mum, but working fine here in the latest versions of IE, Chrome and Opera, though loading one's personal details at its usual snail's pace. However, while clearing cookies and the cache can occasionally help, a 500 error is an error on the server end, i.e. BT's end. Though it is unusual that it is hitting you and your mum but not others. The only other thing I would suggest is contacting them directly about it, but good luck in getting someone who understand

.