P.S. I just tested again and realised that going anywhere on www.gardenweb.com creates this situation:

"Successfully blocked access to a potentially malicious website 208.87.149.250. Type: outgoing"

And the browsing to garden web is very slow now, sometimes have to click twice on the link to be able to proceed.

Technical problems should be reported here (or use the link below):
http://letters.gardenweb.com/letters/mailwebm.html

Here is a link that might be useful: Link to report problems

Neonrider, I suspect it is not the message board but one of gardenweb's advetisers.

Occasionally GW is a pain to use on my Android thanks to fancier advertisements. Oh well.

Well, I've noticed also that on some websites there are malicious advertisements and the owners of such websites should remove such ads if they respect their audience. I reported this case to GardenWeb. Please report it too, so they can see it coming from more than one person.