Peeling on the Samsung, also the (probably VERY Slight) possibility of a Self-Destructing panel.
Possible Bothersome Buzzing, and Fluctuating Brightness on both sets (the latter seems to be more likely on the Pan, but has been reported on both brands this year).
Reports of Gamma problems on the Pan GT - to extent that have read advice to choose the ST series instead - along with a handful of reports of Green Globs showing up on some of the Pan panels.
Again, it appears that MOST owners of either of these sets are very happy, even if some argue that they are content only in their ignorance. It can be difficult to judge the extent of some glitches - Have a Problem tends to be reported more often than Don't Have a Problem - and some people are bothered more by certain things more than others are.
Still, would advise more care in assuring an Excellent Return Policy as opposed to the Absolute Lowest Price when making a purchase decision. That is perhaps always a good approach, but seems even more apt at this time....