Thank you very much for answer!!
The problem with de panel is done
Now the pidgin...... it's resive a "segment violation" error when starts up and interprets it as a bug...
The creepy thing is that ffmpg and unrar do the "same" thing.....both end whit a message "Invalid Instruction" or some thing similar, however this error don't annuls the ejecution (only print ti's out in the end) but both progs can't do their job (the error don't allow ffmpg to conver video and unrar don't extract archives).
....anyway some one know other "msn-like" soft?
PD: i continue looking for the reason of the "memory errors" any news will be posted