Sorry to bother you but I know you do have experience with Linksys RV082 router.
My problem :
When I dont use load balancing mode (Smart Link Backup : Primary WAN WAN1 WAN2 (Specify which WAN is primary, the other one will be backup) only WAN 1 or WAN2 everything is fine.IE is opening, no problems connecting to irc/icq/msn ...
If I switch to Load Balance (Auto Mode) I have to try and open IE sometimes 5-6 times before I'm able to connect, and same with all my messengers/well internet connectivity.
DO you have idea what is causing this issue? Firmware is upgraded (latest one).