One of the biggest issues I had since owning a mac was the inability to tab through items in a form on a webpage.
Text boxes would tab through no problem, but what about the Pulldowns, checkboxes, and submit buttons?
What about the OK and Cancel buttons you get on a Mac Popup???
I resorted to using the mouse for this until i was explaining one thing to another friend in the System Preferences, and tucked away in a spot i would never think to look at held the option to change and make this possible…
System Preferences >> Keyboard & Mouse >> Keyboard Shortcuts

i originally thought this was just a fault of the os x system and never bothered to look for a remedy. now that i’ve found it, i’ve been a form tabbing maniac again (lame, i know, but it’s true).
Thank god.