Not necessarily, depending on your gauge/tuning. It'd be a worse situation and QUITE odd if your frets were higher on the treble side than the bass side, especially uniformly so.
Nah I'm just using 11-54's in D standard so it's nothing too extreme, and the frets are even enough... just didn't want to be placing any undue stress on the guitar.
Ok...then it's normal. If you look at the nuts you can notice that the "top" side is higher than the bottom...generaly you should "transport" that inclination to the bridge as well, but not always.
Anyway it's pretty normal situation...the bigger strings need more space to move than the thin strings so they need to be higher.