This is from my phone, so I apologize.
I have an '08 WRX that I took in for having a squeaky pedal. The dealer greased everything and it still squeaked. They ordered a new clutch assembly and it still squeaked. A Subaru rep happened to be at my dealer that day and said he's had a few of these come across his desk but not enough to issue a bulletin. The issue is a broken weld between the mount for the pedal and the firewall. As I type this they are dismantaling my driver's side dash to gain sufficient access to repair the welds. I wouldn't be surprised if this starts escalating to a bulletin soon. Thank God it's warranty work.***********