The right shoe's insole/foot bed area had a defect that resulted in a raised line that rubs my heel awfully.  I've tried buying other insoles, but they're either too large or uselessly flat.  If they're thin enough to be worn with the shoe, they quickly take on the shape of the defect also, so I'm left with brand new shoes that I've worn a few times and cannot return now.  I'll definitely remember this when shopping for a replacement pair.  The shoes also appear wider than normal for this size range.