It seems that after yesterday’s extended downtime for Twitter (which no one really raised much of a fuss about, since it’s just another routine day for tweeps worldwide — unlike, say, Skype) has some (severe?) repercussions: search results are being limited to the past ~6 days for low-volume queries.
A quick search for “git tower” on Twitter returns results limited to the past six days, only. (A quick shout-out: Tower.app for OS X gets our award for best Mac development tool of 2010!) And the same goes for searches for “NeoSmart” or “EasyBCD.” (Unfortunately, none of these topics are anywhere near “trending” on twitter, and the low volume of search results serves to prove the point).