You're not going to have much luck contacting RIM about an OS that isn't released yet.
I haven't had a lick of trouble with my browser on .314. I performed a BBSAK low-level wipe prior to the install, and the browser worked straight away. In all fairness, I don't have the Internet Browser appearing either ... but I'm on BES, so the BB Browser works just fine for me.
What the heck is this "browser fix" everyone keeps talking about anyway? The few quick searches I ran just came back with people saying "i tried the browser fix", but I gave up dumpster diving for the original defintion.