For the past few months now I have been having issues when posting to my WordPress blogs. I type in the post and click Publish and after what seems like forever a blank post.php page appears. The post does get submitted but a blank page is shown. After alot of debugging I have solved the issue.
If you have this issue with the blank post.php page when posting then the issue is most likely some one of the sites in your ping list is timing out.
Alot of people say that by simply removing http://rpc.pingomatic.com from the list it should work but this did not work for me. I had to go through alot of the ping list to eliminate which ones were causing issues.
Here is my current ping list and with this ping list I do not have the blank post.php issue. Hope this helps someone else. 🙂