Prescaler & CLKO

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I am playing around with clock oscillator modules this one is 1MHZ used as input to PB3 CLKI on a tiny45.

In the program I devide by 32, the fuse is set to output clock on PB4

The high signal I get from CLKO is stable at 0V but at 5V it has the 1MHZ signal in it dropping to 2.5V on every tick. Anyone know why?

Blue top -- 1MHZ clock output
Red Bottom is the CLKO pin

Hmmm cant add attachment...
Hmmm Attachments work today...