Bug fixes

Logo now links to the homepage

Backported version of the 6.x branch.

Fixed important bug where a function call was named incorrectly.
Removed unnecessary testing watchdog calls.

- better admin/build/block style.
- fix footer region location.
- tricky hack: don't display header-region if empty, fix buggy IE7 display.

- sync update with 6.x-1.x-dev.

Fixed regression i.e. #211901 and #212092.

As of December 6th, 2010, the 5.x branch is no longer supported.