Brake problem...

Okay so i have front discs and rear drums. I recently replaced my brake booster (it was leaking) and my master cylinder. Also did the 2 lines from the cylinder to the distribution block. Now when i release the pedal the front brakes make a pretty loud squeak. Now i didnt bleed the rear brakes yet but i did clean and lube the L/F pads/caliper to no avail. I was just wondering what could cause it to squeak when releasing the brakes? It also squeaks a little when turning but not if i am in park or neutral and i release the brakes. The rotors are relatively clean too.

Well, not a brake problem…caster rod rubbing against the bracket due to bad bushing.