IDLE crash when i type the character ^ (for example writing "ê" in a comment). I have the crash only on Mac OS X (Mac OS X 64-bit/32-bit Installer (3.2.3) for Mac OS X 10.6 and 10.7). I don't have this crash on Linux.
Do you have a recent version of ActiveState's Tcl/Tk distribution installed? If you do not have this installed you ran into a known issue in Apple's copy of Tcl/Tk, see <http://www.python.org/download/mac/tcltk/> for more information.
My system is an up to date OS X 10.7. The Tcl/Tk package is the default (I haven't installed a specific version). Should i need to install the ActiveState package ?
Yes. As the webpage I mentioned describes Apple's installation of Tcl/Tk contains a number of serious bugs, one of which is that Tk's handling of dead keys (the "^" you use write "û") causes crashes. To get a fully functional copy of Idle you'll have to install ActiveState's Tcl/Tk as well. We could ship a copy of Tk in the installer as well, but have chosen not to do that because the installer is large enough as it is. Furthermore the Cocoa port of Tcl/Tk is at this time still a moving target, which means that we couldn't even ship the same version of Tcl/Tk for the entire lifetime of Python 3.2.x. Please let us know if installing ActiveState's Tcl/Tk fixes the crash, I expect it will but you might have run into yet another Tk bug.