Hey there. I just very recently installed Xubuntu 12.10 x64 on my laptop (specs below). After installing the fglrx driver and the Restricted Extras, everything seems fine, except for one problem. Whenever I open YouTube, Listen On Repeat, or any other video streaming site, I notice that the video is buffering extremelynslowly. The video which takes about 3-4 minutes to buffer on Windows 8 on the same machine takes 30-35 minutes to buffer in Xubuntu. I experience this problem in both Firefox and Chromium. Specs:

AMD APU A8-4500M x4 @ 1.9 Ghz (4 threads)
AMD Radeon HD 7640G 512MB DDR3 (shared memory)
8GB DDR3 1333Mhz RAM (7.48 usable, rest used by GPU)
Atheros AR5BWB222 Wireless b/g/n
Atheros AR8151 Ethernet Gigabit Ethernet (unused)

Help please?