It won't meter in Av (Aperture priority) mode. When I first turn it on, the camera does ok for a while, but sometimes will go straight to blinking "4000" for 1/4000 (too much light). One time it even gave me a 20 second exposure even though I was consistently in the 1/160-1/250 range. After this, it went into blinking "4000" and won't give an accurate reading. I just keep it in Manual mode and bracket my exposures to find the right combo. Cycling the power does not help for whatever reason.
I've had my "eye" on the KatzEye for a while now, but it will effect metering (if it worked in the first place

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At the moment, I have one EF lens and 2 Pentax lenses
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Current lineup:
300D | SMC Tak 135/3.5 | Fujinon
EBC 55/1.8 | Vivitar 28/2.5 | Hanimex
MC 28/2.8 | Tamron SP 90/2.5 Macro + SP 2x Tele = 1.1 baby!
Good things come to those who focus themselves