2003 tracker power window

When my left side power window goes up it is not level the rear of the window is higher than the front. About halfway up it binds, I can pull up on the front of the glass and it will come up. No problem coming down. Is this an adjustment problem? It has done this since I bought it used 9 years ago. I have not had a big problem with this situation but I may want to sale or trade it and I would like to fix it before then.
Thanks

Unfortunately, I cannot give you a definitive answer on this; however, I have the EXACT same problem. I did manage to fix it one time. I basically just took the panel off of the door and fiddled around with the track a little bit and it fixed for awhile, but I could not really put my finger on what was causing it. I believe the only way to fix it may be to replace the entire track...so for now, I am just living with it, but it is so friggin annoying.

Mike