Broken: (example: 2.70 RC1 19f7f9a, see splash screen)
Short description of error
The Tool tabs are amazing, but the old or uncategorized addons, keeps appearing on every tab and making a mess and tabs useless.
I would suggest a simple fix for it: to create a tab for those addons, named custom, general, old, miscellaneous, others or something else. So even old scripts would work great until they migrate to the new UI tags and don't mess with the new ones. I believe its almost impossible to all addons being converted soon, so it sounds a good way to keep the toolbar organized.
Exact steps for others to reproduce the error
Open Blender 2.70 RC1 and import previous settings to get all the addons running