Just logged in and found there are commercial links embedded within post's, seems key words or phrases trigger them.
For instance as I type this post the word start, as in (start a new topic) links to a site advertising a $77 per hr job at home, the word (topic) links to a phone site, as does the word (logged)
There is no way I would click on any of them.
First time I've encountered it in a forum situation, could it be spy ware? very sneaky.
I started a new topic this afternoon and didn't notice anything unusual. I'm wondering if it's spyware in your system Santa. Malware is a good anti-spyware freebie.
Wouldn't be surprised if it was in my system, ran a scan after my OP in this thread and picked up a couple of problems, getting rid of them seems to have sorted things out.