In these cases only a WTF explains my feeling the most.
I'v made a program coding and debugghing on a Mega1280 , and then , since i needed more memory i took a 2560.
The problem with the 2560 was that the upload freezes with TX RX led blinking infinitely.
I'v checked some of my older "version" of the sketch, since i found the one that feeds the 2560. Well, the problem was due to those two BMP images:
WTF??? Why?? Becarrerful to BPM when using the 2560... Do you know why this was happening? If can be helpfull i can copy de HEX code for the BMP.