Red Hat / Fedora :: RPM Kernel Upgrade To Latest Version (SL6)

I am relatively new to the Linux System (8 months). I am having issues after upgrading the Scientific Linux 6 kernel from its current 2.6.x version to the latest version that SL6 has available. The issue is that once I install the upgrade and reboot, the internet becomes extremely laggy when scrolling on web pages, so much so that you get a ripple like effect as your scrolling. Which doesn't occur in the current kernel i am using.

Current Kernel is: 2.6.32-71.18.2.el6
New Kernel RPM update is: 2.6.32-71.29.1.el6

I wish I could figure out the problem but I am having trouble identifying what exactly the current kernel has that the new one doesn't that would cause the internet lag. I have read other topics with similar kernel update problems, but none have expressed an internet problem & only an internet problem from a kernel update.