Another thing...
http://www.pclinuxos.com/forum/index.php/topic,67463.0.html
Would your problem be similar to this?
Andy
EDIT: Links to the sites that gives you hassle would help to diagnose the problem. Also some specs / info about which PCLinuxOS version do you use. I am not the sharpest tool in the drawer but if I can ask enough questions You may give me the answer that will help someone else to diagnose and help you solve your problem.
Yes fully updated.
Addons - Adblock, Stumbleupon, Vacuumplaces
Not unlike that problem but not the same.
Sites that gave me trouble in the last few days - My online bank --
ubank.com.au -- but this would not help as you cannot login.
Another site today was a horse racing spam or optin site --
www.bfmiracle.com. I get a number of these as racing is a bit of a hobby and I like to respond to some of them.

This one is casing that trouble right now.
Can't recall others offhand. Some are unimportant but to visit my bank I have to use another browser and that is a pain as my other browsers don't have all my bookmarks etc and importing is a hit and miss thing.
I use Minime 2009 with kde4.3.2 fully updated.