The other issue to consider is speed, but you have to be a pretty good coder if removing warnings is the best optimization that can be done to your program.

I always leave warnings turned on. But then, the majority of the code I write isn't going to be end-user applications. If it isn't strictly for myself, most of the time it's intended for sysadmins or other technical people.

I very much prefer a bug report saying "the program reports 'Use of unintialized value on line 619 of Module.pm'" instead of "the program doesn't work correctly".

Abigail