Early this week I upgraded WordPress to v2.9.2 and I noticed that I can no longer post a comment on scheduled posts. The reason I do this is because on certain articles I shut down comments to avoid invalidation of the cache and I like to advise the reader when doing so.
According to http://codex.wordpress.org/Version_2.9.2, wp-comments-post.php was indeed changed. Can anyone help me understand the cause? I tried with both Firefox and IE7 and on both I got the blank page. Before v2.9.2, I remember having the same problem if the article was set as draft, but not as scheduled.