I succesfully got PWM working on my AtMega8, by doing the following:
I set WGM10 and WGM12 for 8-fit fast PWM.
I set COM1A1 and COM1B1 to set on match.
I set CS10 for no prescaling.
WGM20,WGM21 for timer2 fast PWM
COM21 for clear on match.
CS20 for no prescale.
There I went, I could set OCR1A, OCR1B, and OCR2 and things worked well.
But, on a Tiny25, no worky. Here's what I've tried:
set COM0A0, COM0A1, COM0B0,and COM0B1 for set on match.
Set WGM00 and WGM01 for fast PWM, 0-255
set CS00 for no prescaler.
Then I set OCR1A and OCR1B... but no output on pins 3 or 6.
I imagine that I've just missed something simple...any suggestions?