Hi, I noticed that the main index template file of the WP 3.0 TwentyTen Theme prints a blank space on line 16 before get_header() is called.
This broke a plugin of mine.
Fix is simple. Just remove the space from the index.php template file which appears on line 16, the line just before the get_header() line.
Is this something that can be sorted out before final WP 3.0 release as it could break other plugins that use get_header to run functions before anything should be printed to screen.