Yeah i've been getting an Error all day as well ,can't tell number as its at bottom behind green loading bar,flashed up line fourteen at one point .Frustrating as it keeps going back to catagories as you try to load the thread or click on a post.
windows excuse says......website has either a) maintenance problems or b)web output failures. Cant do it word for word incase I can't get back to here. If I do get to home page and select a thread, my computer either "Hangs" or comes up with could not "Contact server" jargon. The "Internal error" report suggests it is the website itself. Hope it can be corrected Nick, thanks mate.
For what its worth I experienced similar problems last year particularly the excessive slowness.
I was advised to download "GOOGLE CHROME" and the normal operating speed immediately appeared to increase by a factor of about x 20 - never looked back since !!!