In a message dated 7/11/05 9:38:18 AM, lauterba@BELLSOUTH.NET writes:

<< What do I need to do to fix this problem? >>

There should be a nylon wear pad about an inch long in the track near the
forward end of the window frame.  This might be missing or worn beyond
usefulness.  If you cannot find nor replicate a replacement, remove the sliding latch
and waste away a little of its material at the end of its recess which strikes
the tee fitting attached to the window whenever the latch is in the locked
position.  Hell, that even confused me!  Just get the latch body in your hands and
remove whatever material you have to get it to ride higher.

George