Originally Posted by Litespud

I don't think so - I would expect some noise or clatter as the new chain engaged with what I think is a worn chainring (that alone would be enough to make me replace the chainring). I suppose the teeth could ultimately become so worn and "hooked" that you'd start to experience chain suck, where the chain wouldn't disengage at the bottom of the chainring, but you're nowhere near that, and that's not the problem you're reporting.

BTW a 46T big ring should be well within the capabilities of your standard FD - it is can push the chain off the small ring (36?), it can push the chain off a 46. Just make sure that your FD cage is close (~2 mm) to the top of the teeth when on the big ring - hard to tell from the pics, but it looks a little high to me.

It's also possible that the after-market rings are spaced sufficiently differently from the original Shimanos that it's throwing off the front shifting. However, I'm assuming that the shifting was OK until you replaced the chain and cassette, so slightly off chainring spacing. Do you still have the original rings? Could you reinstall them, measure the ring spacing and compare it with that of the new rings?

Originally Posted by zandoval

Evidently you are replacing the chain rings because they look a little worn. If so then do all the components. Really it looks like its a front derailuer problem and a slightly worn ring.