For me, a new built must, above all, be compatible with Windows 7.
Is there a list/post somewhere here on the forums that summarizes what all the Win 7 compatibility issues are?
A few of them that I recall from last time I worked on it were
- The new tray icons actually getting loaded
- The new tray icons positioning their popups correctly relative to the displayed tray
- Having the background actually update when set through display properties while BB is the active shell
One of the more technical issues that I don't know if any of the shells have resolved it yet are handling RUN_ONCE start-up items in HKEY_LOCAL_MACHINE when UAC is enabled, as the shell does not have the neccesary permissions to remove them after running them. Explorer is *somehow* able to make this work, but I never could in a BB shell.