A couple of days ago, a piece of javascript was inserted into the root file of www.pattayatalk.com. This was flagged by Google as being malware, and it probably was, though I am not sure what it was doing.
The problem has been detected and resolved, but Google will still report the site as an "attack site" for a short while until they can rescan it and give it a clean bill of health.
Until that time, you will see a message something like this
when you open the site or try to access the forum.
If you're feeling brave, go ahead and click the PROCEED ANYWAY link to continue.