Hi there, have you ever used extrude on a polygon in maya and added segments rather than repeating the extrude however many times, and the uvs got screwed up and the texture looks stretched ? Well let me tell you its happened far too often to me, but the other day I found a way to fix them automatically.
Step 1:
Select the object with the messed up uvs.
Step 2:
While in modeling mode, left click uvs in the menu at the top of the screen that starts with file it should be fifth from the right.
Step 3:
click automatic that should fix them.