Yeah, I noticed that problem with the wp-cache plugin as well. As amanvell said, the easy answer is in the wiki:
[quote]If you have “blank pages” in Wordpress with wp-cache turned on after you upgrage to PHP 5.1.2 - there is simple fix to solve the problem:-
- Open wp-cache-phase2.php file* in your favourite text editor
- Find out wp_cache_ob_end function
- then inside that function find out line with: ob_end_clean(); (it should be line 219 or about)
- and finally replace that line with: ob_end_flush(); [/quote]
The difference is that the clean function clears the buffer and the flush function sends the data from the buffer before clearing it.
Check out Gordaen’s Knowledge, the blog, and the MR2 page.