Can't turn off 802.11b in T3200m wireless advanced settings

[ccy10]

In the T3200M configuration page, in Wireless Setup, Wireless Advanced Settings, under Compatibility Mode, I can't change to a mode that doesn't include 802.11b. When I switch to Balanced Mode and click Save, it switches back to Compatible Mode.

[FuzzyLogic]

I just tried mine and the only one I could select that doesn't include 802.11b and 'sticks' is Performance Mode 802.11n.

So it's not just you.