No database problems that I know of. Deactivating plugins makes no difference.

In the db’s options table:

template = correct_theme_foldername
stylesheet = correct_theme_foldername
current_theme = WordPress Default

So current_theme is showing the wrong data, but I assume this does not matter. Can I correct it though – that is what I’m wondering. It looks as if the current_theme field is purely for admin display, not actual Theme selection, but I’m not sure.

You shouldn’t use auto_prepend_file and compression at the same time. They are mutually incompatible.

Many thanks. Mystery solved.

I’m using auto_prepend_file because I have dozens of non-WordPress pages on the website and didn’t want to have to edit each one to add Mint. Without compression all seems ok, but I’ll need to have a rethink for the long run.

WP Super Cache is an impressive plugin.

With WP Cache and Super Cache enabled but compression disabled I seem to have no problem. When I see (at the bottom):

<!-- Dynamic page generated in 0.659 seconds. -->
<!-- Cached page generated by WP-Super-Cache on 2009-10-15 10:48:57 -->

OR:

<!-- Dynamic page generated in 0.414 seconds. -->
<!-- Cached page generated by WP-Super-Cache on 2009-10-15 11:03:54 -->
<!-- super cache -->

… my header includes:

<![endif]-->

<script src="/mint/?js" type="text/javascript"></script>

</head>

… as it should.

But when the bottom shows:

<!-- Dynamic page generated in 0.683 seconds. -->
<!-- Cached page generated by WP-Super-Cache on 2009-10-15 10:44:40 -->
<!-- Compression = gzip -->

the Mint JavaScript doesn’t show. So it seems that somehow, with compression, auto_prepend_file in .htaccess doesn’t function. That’s all I can think of really.

I don’t know if it’s a bug in WP Super Cache or some other caching issue. I’ve been using the same Theme for a while. What is happening is not Theme-related as such. For instance a few weeks ago I added some JavaScript to my standard footer, and also installed Mint tracking using auto_prepend_file in .htaccess, which puts a script in the header. Then I made some changes to the stylesheet – stuff like that. In amongst all this I installed WP Super Cache as well.

When I enable WP Super Cache those structural changes are not always visible when viewing pages in a browser – the design sometimes (but not always) reverts to pre WP Super Cache. But when I turn off the plugin, the latest design is always there. It’s some kind of caching issue but I don’t know what.

I turned it off for two weeks to see if old bits got flushed way, then enabled the plugin again. But still – in Opera especially – the old design pops back up. Same for visitors, as I can tell when Mint stops tracking because the JavaScript disappeared again from the header.