Have noted same thing here. Refreshing the updater resulted in no change in status.
Think what happened here is that Adobe did a non-standard thing in making both Windows and plug-in upgraded versions different and not the same version number as usual. IE version is different from the NAPAI plug-in version, i.e., 12.0.0.38 and 12.0.0.43. Avast wasn't ready for that or it was a detail overlooked in updating the updater database.
Same thing happened over at Secunia with their PSI program, but over there the new active X version was missing entirely from their database. Fixed now.
As long as one has faithfully followed the security process of updating exploitable programs with newer versions as they come out, and has verified that the old has been tossed and replaced with the new, there is nothing to worry about. You've done all you can.
Certainly would not select "ignore update" due to a database error, as here. That might lead to unforeseen consequences down the road if left as is.
This avast issue should be fixed soon.