Has anybody else had this problem? My X button and Left "Trigger" are having trouble. I just got it last Christmas too.
Yes I've had similar problems. I have the psp fat and wanted to play SF3 on it but found the D-pad to be too unresponsive so I went to google and did some research and came across this site....
http://ufighterx.com/guides/videogame/pspdpadfix/pspdpadfix.htm
If you don't mind voiding your warranty then there are certainly ways to fix the issues. It was worth it to me. Just go online and search like "psp button mods" you're going to need a #0 screw driver (i think) and "patients"