Dropbox Ver. 1.1.1 - Install this with Root Explorer or Astro. Uninstall the previous version first.
Dropbox 1.1.1 Version 2 - This has the inverted lockscreen settings, but I'm still fighting with the regular settings screen. I have also changed the app icon to black (Thanks to stetsonaw for pointing this out. I guess I was kind of tired by the time I was swapping out images.). You should be able to install this over version 1.