Any problems entering China w/ Taiwan passport stamp?

[minatonka]

Is there any problem currently for US citizens either obtaining a China visa or actually entering into China if you already have a passport stamp for a Taiwan visit?

[christep]

I can't speak for US citizens, but as UK citizen I have absolutely no problem with multiple Taiwan and Chinese stamps/visas.

[pegasus8228]

many of my ex-colleagues (US passports) going across the strait with no problem (via HKG, of course).

there is no reason for such a problem.
chinese are very pragmatic people.

[akhullar]

Nada

[YVR Cockroach]

Bear in mind that the PRC wants to open direct transportation links with Taiwan but the RoC government is hesitating.

I think you'd have more trouble entering the RoC with a PRC stamp but I doubt either care currently.