On Friday I upgraded to the latest BTYahoo software. Could not get onto the board at all (plus a few other sites). Was not able to open more than 3 explorer windows without the "Send Error Report Message". If I booted up and went through the "Normal" explorer I had no problems.
I contacted BT YAhoo and they sent me the standard "go into Control Panel etc message delete the "old" software then go to their site and install the New (as if I hadn't done that already). So I've now deleted the BT YAhoo software and am surfing the net through the standard Microsoft Internet Explorer without any problems (BTYahoo take note).
If and when, BT Yahoo overcome this problem, I might reinstall their software!