geoffdaw

I hit the same problem when upgrading other sites and I believe I have narrowed it down to the Search & Replace plugin. Disabling just that plugin seemed to get rid of the error.

The plugins were:
CMS Tree Page View
Easy WP Meta Description
Search & Replace
TinyMCE Advanced

I have done a code search on the plugins and there are no references to wp_rewrite or flush_rules.

I have other sites to upgrade to use ssl so I will see if I hit the same problem and if I do then I will disable the plugins one at a time. In any case I will report back.

Thanks Mark for the quick response. That did the trick but I don’t know which of the plugins caused the problem. There were only 4 simple plugins and I couldn’t imagine why any of them would be using rewrite rules.

It is still a bug in 0.9.8.4 ??

Probably too late an answer to be useful but I did see this behavior when I was playing around with MultiEdit a couple of years back. I managed to fix it by changing a line in multiedit.js (line 33 in the 0.9.8.3 version I was using) from:
jQuery('#multiEditControl').append(jQuery('#multiEditHidden span'));
to:
jQuery('#multiEditControl').append(jQuery('#multiEditHidden span.multieditbutton'));

I was going to check it out using the 0.9.8.4 version of the plugin but I can’t think how I got the span into the content as it seems to strip any changes made in the Text window.