AVR-Chat

I am using the ATmega168 and the ImageCraft C compiler (version 7.02).

My program does interrupt-driven UART communications (among other 
things).

It appears that it the program gets "too big" (even though all sizes 
are within allowable limits), that the input (as viewed with the AVR 
Studio debugger in the Receive Interrupt routine) becomes garbled.  
Examining the UART registers (which control baud rate, data bits, 
stop bits, etc.) shows identical values as with a smaller version of 
the program, which works correctly.

The problem can be made to go away by removing the following code 
from the initialization sequence:

            CLKPR = (1<<CLKPCE);           // enable clock prescaler 
change

            CLKPR = 0x00;                         // set prescaler to 
divide-by-1

 
This code was added by my predecessor and I'm not sure what it 
accomplishes, since it seems to be adjusting the clock speed by 
dividing by 1 (which should result in no change).

Has anyone seen a problem like this?

Thanks in advance,

Michael Bate