When scrolling around a large file, sometimes its useful to be able to scroll horizontally too. In textpad, its super convenient that I can simply hover my mouse over the horizontal scroll bar, and then use my mouse wheel to scroll horizontally.
This should be pretty easy to add in, but very nice to have.
Thanks for your consideration. Regardless, I'm buying this ide soon. I tried ALL the others, even the new Zend Eclipse plugin, and PhpED is by far the best! Seriously, one of THE BEST features is being able to use toutise svn from project view. All the other ides and editors get this wrong.