I've noticed across multiple themes in Sublime Text 2 on Ubuntu that there's a full page of scrollable white space after the last line of any document. I don't see this behavior when running the application on my mac. This is the most current version (just installed on Ubuntu earlier this week).
// Set to false to disable scrolling past the end of the buffer. // On OS X, this value is overridden in the platform specific settings, so // you'll need to place this line in your user settings to override it. "scroll_past_end": true,