In chooser lists, treat deleteToBeginningOfLine: as delete:

This is only if there is a responder for the delete: action and is done to allow ⌘⌫ to be used to delete items in the list (like favorites).

The implementation is not ideal as we make assumptions about what action the ⌘⌫ key is bound to and perhaps it’s also a gotcha that ⌘⌫ in a text field will delete something else (though the list is also drawn as having focus).
Remember open files per (project) folder

This means that if one does “mate «folder»”, open a few files as tabs, and then close the window, next time the same folder is opened, TextMate will restore the tabs.

Presently state is remembered (when closing a window) either if the file browser is visible or if more than one document is open in the window.
Add “Recent Projects” to “Open Favorites” dialog
Add delete action to Open Favorites

This only works for Recent Projects (not Favorites).

Also, the key equivalent for this is ⌘⌫. The Edit → Delete menu item will not work (as it’s being sent to the input field).
Checkin release notes