Over the weekend, Google's shopping search, aka Google Product Search seemed to have started to have issues.
Searching for some popular products brings up no matches found.
For example, a search for [xbox] returns nothing:
Others are complaining that Google Product search returns either zero results or totally irrelevant results.
Google has not yet confirmed a bug nor have they chimed in with a time for a fix.
Forum discussion at Google Web Search Help.
Update: This is now fixed.
