Forgot password locks up and products not showing up

[MarkWind]

site been working fine then today

if you try to reset your password it locks ups, or just shows a white screen when you click submit

if you only have one product in a category, and you click on the category it shows a white screen. If you add another item to the category they both show up

Also, if you click on all products the item shows up

where should i look?

[MarkWind]

Found the problem,

Hosting with godaddy, pointed a 2nd domain name to the same folder, those who used the 2nd domain had the problem.