I installed ubuntu interpid and it was normal like any previous releases, but pidgin was so sux it always crashes by one of this ways after using it for a while:
1- Exiting by it self and I have to open it again.
2- The smiles wont work and the when someone send me a file it wont save it and also when I sent files to others the same, so I have to restart the program to work again.

I have tried to completely remove it and reinstall it and nothing changed, I have searched to add the pidgin developers repository from the launchpad.com but its only available for ubuntu hardy.

After that I installed amsn from the official ubuntu repos for the webcam and voice chat and also it crashed after 20 or 30 minutes so I also completely removed it, then downloaded the debain packages for amsn from debain.org and I think It works cool, but I didnt have done this with pidgin because pidgin have a lot of packages not like amsn (amsn package and the data package).

Do any one have the same problem and have fixed it?
does this make sense?: I open the computer for 24\7

I would start pidgin from the terminal and see what messages you get when it crashes. You could also start with with debug messages and that may provide more info.

FWIW, my intrepid install works fine.

As a final option, try only signing into one or a couple of your accounts at a time if you have more than one. It may be a protocol issue.