When using the Mac product with the Safari extension used with the Mountain Lion OS, any time I try to type a question mark (Shift-?/) I get no question mark, and instead there is random auto-fill behavior. Examples when trying this:
In Wordpress when creating a new post, it auto-pops "admin" into every open field.
In Google Drive, it pulls down the font-size drop-down list.
In my own website's newsletter opt-in form, is enters some arcane string.
In the Google search window, it auto-pops my email address.