When importing an image and the Place dialog window appears, I type a letter to quickly get to the image I want to import, instead of scrolling down or moving the mouse and clicking.

This works about 50% of the time. It's as though there's some kind of timeout whereby if you import too many images in a row (one by one, not multiples at once), it won't recognise a keystroke. So, many times it simply won't work and I have to click the filename with the mouse to highlight it. This also happens in Illustrator..