I had VBulletin and I am using Xenforo years ago. I have htaccess redirects and everything was working perfect until now, I went from 1.3.x to 1.4.2 and now I have thousands of 404 errors from all the old stuff. viewtopic.php?f=7&t=586 calendar archive memberlist etc... All of them suddenly appeared in WMT as 404 errors. What was the change in 1.4 so this happened ? How can I fix it ? Thanks.