If that is indeed your issue, looks like there's nothing to do but either downgrade, or wait for Apple to acknowledge, diagnose, repair, and push the fix (not necessarily in that order).

Be glad you haven't been using an Intel 7620 WiFi card, which has been utterly broken (no connection after resume, and connections drop and/or slow down to unusable) due to bad drivers since around springtime... and has only in the last week or so had a fixed driver appear, and only then from an OEM driver update (official fixed drivers don't exist on Intel's site).