Aggie,
If it try's to open the edit window and it's just blank... then it's not the forum doing it, it's something on your computer causing it. It can be numerous possible things... security settings, minor system or browser corruption or even malware related...
As such... I'd recommend....
..... an alcoholic drink of your choice and don't worry 'bouts it...
( I'd join ya, but... they can trigger migraines in me ... so I'll just watch.... unless that'll cost me a 5'er...