living room slide out crack

I purchased a 3200ES in March and have been happy with my trailer except for a few issues but this last week end i was going around the rig looking and i noticed a 2 foot crack in the living room slide on the out side there is no scraces in the paint and no impact signes just a crack i will be contacting heartland but i was wondering if anyone else has had this problem.

I've only noticed small spider web cracks on the door-side, rear corner of my 3600RL

Here is another thread that talks about the same thing. //heartlandowners.org/showthread.php?t=1857&highlight=crack
Another one at this thread. Read the fifth post for Scott's reply. //heartlandowners.org/showthread.php?t=1585&highlight=crack