Currently the forum is having some login issues due to the new patch. If you get to the error screen just retype www.compositescentral.com in your url bar and hit enter or click on the link provided on the error page.
For those curious of the details
vBulletin figured out that phishers can steal you login info by redirecting the page to one of their own. Basically they could access your information by passing it a URL that wasn’t this www.compositescentral.com.
However for some reason this also prevents the forum from redirecting to itself, which is why you have to manually click on a link (or retype the url) to get in.
This is extremely frustrating and I hope they release a fix soon. vBulletin has slowly been going downhill and if it continues like this I’m going to consider moving to another forum software. I apologize for the difficulties.