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I've just looked at a Google coding standards document for C++ in which the arguments for not using unsigned integers are incomprehensible.

http://google-styleguide.googlecode.com/svn/trunk/cppguide.html

At one point it states this:

"Consider:

for (unsigned int i = foo.Length()-1; i >= 0; --i) ...

This code will never terminate!"

The fact that you can write stupid code which includes the type 'unsigned' does not seem to me to be a good reason not to use 'unsigned'. I can write stupid code using any C type you like.

Perhaps you could point to the good arguments that you found.