Hashtag/set number links on the forum don't work

For the last couple of days, whenever I click on a link in anyone's post that has the hashtag and set number, it no longer leads to the set in the database. So when someone included #75523 in their post, instead of getting the set when I click on it, I get the following URL in the address bar: 

http://bricksetforum.comhttp//brickset.com/sets/75523-1

And my browser's error message says "bricksetforum.comhttp’s server DNS address could not be found."

I don't know if the problem's at the forum end or the database end - at first I assumed people had just accidentally typed in nonexistent set numbers, but now it happens every time I click a hashtagged number on here.