Photoshop: Marquee selections no longer sit on whole pixels all the time.
Some people would probably say this isn’t much of an issue, but when doing UI work it’s really throwing off my confidence in the tool and I have reselected several times just because at a glance I feel I have selected 1 pixel off my intentional selection.
It’s little things like this which really need to be solid in a professional piece of software. And to see this in an application as mature as PS just screams amateur hour at Adobe to me.