The eyedropper in Photoshop samples values from the document -- the display profile is not involved.
Only system level eyedroppers (that see screen values and not document values) would be affected by the display profile.
I also use a ColorMunki to profile my displays - and it's pretty accurate for me.
You are right, Chris. Photoshop's eyedropper returns the correct value. I was getting confused by the readings from Classic Color Meter, as well as some menu bar color picker apps. Within Photoshop, everything is OK. But I used to get a dead match between Photoshop's eyedropper and the old Apple Digital Color Meter. I guess I can live with this.
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You can only get a match if the document and display profiles are identical (say, sRGB or AdobeRGB for both).
The normal case is that the document and display values will not match.
Thanks, that is helpful, because I understand the subject better now.