Yes, we're in the process of updating our mods. This error will vanish once we release and you update. Please be patient whilst we complete testing on the live server. Whilst there's some merit in releasing new addons before the test realm goes live, there's the counter argument that it's good to for the devs to check things out on live server on the off chance that something changed between final test build by Blizz, and what went live.
I can say that last night when Live when down, Norganna and a couple of other devs were hard at work still on the test realm ensuring that we have some juicy new upcoming features for some of our mods, and that we've got a grip on any major outstanding issues. This specific issue with DoubleWide frames, has been removed from our development and will be fixed once we release, which should be pretty soon now! :)
Thanks for your time in reporting this error, altohugh we were previously aware of it we nonetheless greatly appreciate your feedback.
I get the same thing. The first time I hit scan I got the error. After the first time the scan begins to scan without errors but only scans the first section that is checked (ie, Weapons, Armor, etc)... it doesn't scan everything at the AH even though all sections are checked.