Serial Problems with Duemilanove 328

Hello,
Newbie in Arduino-land :slight_smile:
Bought Duemilanove with 328 and dloaded working sketch that ran on Duemilanove with 128. Sketch uses serial port for multilevel menu output to LCD. Problem: using 328-board yields corrupted (garbage!!) text on LCD. Swapped out 328 for 128 and board is fine. This isolated out the 328 as being the problem. I am hearing that there may be a serial-port related reset problem with the 328 and/or IDE and/or libraries - is this true? Is there a fix available? Sorry if this is a repeat but I could not see anything listed......just keen to keep my playtime fun with these neat devices.
Thanks in advance :slight_smile:
Carduino

Apologies for posting this in news :frowning: