I love the Jump To Definition action.  It would be nice to have the same thing for files.  For example, if you place your cursor within a string in a PHP file that contains a file name/path, it could try to open it.  Same thing in other languages, line Django template files, Ruby require statements, etc.

I encountered a problem when Sublime does not start if package upgrade failed for some reason. Fixed with this code at PackageSetup.py:

def upgrade(appdir, userdir, pristinedir, datadir, backupdir):

    packages = (glob.glob(appdir + "/*.sublime-package") +

    glob.glob(userdir + "/*.sublime-package"))

    for pkg in packages:

        try:

            upgradePackage(pkg, pristinedir, datadir, backupdir)

        except:

            pass

When you startup sublime, you have a bunch of files open. The sidebar however, shows all of the folders collapsed. So everymorning I have to uncollapse the folders. One way to solve this would be to not collapse the folders. Another interesting approach would be to have an option in the right click menu for the file's tab. When you click "Show File in Sidebar" the folders auto uncollapse to show you the file. If the a folder is not in the sidebar for the file, you could add the file's root dir, and uncollapse from there.

One feature I love from Qt Creator / Eclipse is the fact that it remembers the places you've gone to (file + line) and you can navigate between them by using alt + left / right (back and forth).

For example, you're using a function, you realize you need to edit how the function works so you go to the function's file and edit the code, then you go back to where you where (down to the line) with alt+left. And you can use alt+right to go back to the function's file if you forgot to do something.

It also works within the same file. Though it'd be most powerful combined with the jump to declaration/definition functionnality, without it's still very useful.

To help differentiate between active views in different groups. Currently the active view tab color is a global setting. You can set the active view tab color to help distinguish it from inactive tabs, but there is no way to easily tell which group is the currently active view. This should have its own setting so as to be customizable.