Im using WP 2.9.2 and DB Cache 0.6
The plugin causes an error in the backend comments section, when trying to update a modified comment.
This is the error:
Warning: array_merge() [function.array-merge]: Argument #1 is not an array in /mysite.com/wp-includes/comment.php on line 1315 Warning: Cannot modify header information - headers already sent by (output started at /mysite.com/wp-includes/comment.php:1315) in /mysite.com/wp-includes/classes.php on line 1586
Right now disabling the plugin is the only way to avoid the issue.
The error is also reported by other people here http://wordpress.org/support/topic/285076?replies=5
Any chance anyone has a fix? the author maybe?