So at the same time, the user "vijendrayadav" was renaming a page?
Yup. Got the reason too - if you go "back" when you've done a rename, and try the rename again, it destroys the Main page.
It's fixed in 2.6.2-svn-6 now.
Or does this bug insert an arbitrary user as the author?
No, but once the page is empty, you can of course do whatever you want. /Janne
