Yeah i found this out a wee while ago but basically the CONCURRENCY=shell part caused major issues with HAL and Gnome-Volume-Manager in both 7.10 and Mint Daryna (no surprise there).
That's one that caused USB ports not to work, had problems mounting drives, loads of problems took me a wee while to figure out that was the issue. So i imagine the above wifi card is probably related, either via HAL or the wifi card might be on a USB based one
Anyway 2 cents worth, there you go guys
oh yeah this was only tried on two laptops, i've not tried that on a desktop, so i couldn't say if you'd get the same issue. If you have done it and you are getting problems just set it back to CONCURRENCY=none