UPDATE:
We have upgraded to the latest all-singing-all-dancing version of the forum code this morning.
As I mentioned, yesterday I ran a test programme on the server which checked for any virus files or any other type of unexpected file...
So, the admin are 99.9% sure that the forum has not been compromised (again) and does not contain any harmful links or viruses.
If you are still having issues, can you make sure that you purge all the cached files from your browser and then re-try?
Post any issues on this thread where the technicians and engineers will have a look at them.