Hello,

there in an regression in kernel release v3.1.5. Commit 
43c308bd8d0a3e7d98c5abcd41a4a3fada3d198f "iwlwifi: do not re-configure 
HT40 after associated" break iwlagn driver for Intel Corporation 
Centrino Ultimate-N 6300 (rev 35) on my Thinkpad t510. I still can 
connect to the AP, but i can't pin or access anything. Reverting that 
commit solved the Problem. I attached the patch.

Regards,
Andrej Gelenberg