These are happening a lot. In particular when editing or add a new post with links in it.

I have found that adding a theme that is not properly integrated can cause this most often. Please revisit your theme settings, compare the modified code with the base VB php code and and make sure it is properly integrated. It takes a little more work to add themes than simply uploading them and pointing VB at them. In particular if you update VB after adding the themes.

Sometimes you need to revert some of the changes to get things working again.

Thanks.