In Photoshop CS6 on OSX 10.7 and 10.8 (don't know in Windows) kerning using ALT + arrows doesn't work properly.
At first it works, BUT if you change some parameter in the "character panel" and come back to the text, it's no working anymore. You have click again in ANY field in ANY panel (ex. character size), come back to your text field and it is working again.
Kind of annoying when you are in a hurry.
I can make a video or explain it with more details if you cannot reproduce the bug.
I hope you include this in the next upgrade, it is getting me crazy. In japanese you have to correct the kerning all time.
Thanks