Mega - serial1, 2 und 3 - initialization fails

Hi,

I am running a seeduino MEGA with only one serial (under windows). My code is running at 4800bps because of the device I am communicating with. If I use 017, everything works A1. If I switch to 021, it look like the RX queue is corrupted and the code does not work properly. I noticed that both windows version 017 and 021 are using avr-gcc 4.3.2. I read that the solution is to go to 4.3.x but I guess it wont help in my case.

Anyone had that problem or may have a clue?

thanx

Mart