A simple browser search query of 'from:BPahor2012' will return different results (actually, 3 hits) than there are available if you look at the page of a Twitter account (https://twitter.com/BPahor2012).
Strangely enough, Search API will not return anything for the query 'from:BPahor2012'. No results there.
Can you please look at what might be happening?
Updates
I just tested this using and I am indeed getting results from http://search.twitter.com/search?q=from:BPahor2012 but not from http://search.twitter.com/search.json?q=from:BPahor2012 this is indeed not the expected behaviour. Will look into this.
