Nifft
Penguin Herder
I've seen 3e cover both, particularly when used in comparison to 4e. Like our forums do here, as you noticed.Hmm. I've usually seen "3.x" to cover both 3E and 3.5 with a single term. I know I've personally always used 3E to refer to third edition, and 3.5 to refer to, uh, 3.5.
3.x is used by those who are conscious wish to include both.
Cheers, -- N