TYPO3 Core

On www.blender3d.org, we use publication to static HTML (as this lets us
survive Slashdot like yesterday). We also use the Indexed Search
extention for our search page. With 3.6.0RC1, everything worked ok. I
did add the following like to my setup:

includeLibs.indexedsearch = typo3/ext/indexed_search/class.indexer.php

Since upgrading to 3.6.0, this line causes the following error:

Fatal error: Cannot redeclare class tx_indexedsearch_indexer in
/Library/WebServer/Documents/www.blender3d.org/cms/typo3conf/ext/indexed_search/class.indexer.php on line 36

So I removed it, but it still does not work right. What happens now is
this: after clearing the page cache from the admin panel, publishing of
multiple levels will fail with the following error:

Fatal error: Cannot instantiate non-existent class:
tx_indexedsearch_indexer in
/Library/WebServer/Documents/www.blender3d.org/typo3_src-3.6.0/t3lib/class.t3lib_div.php on line 3177

Here's the strange part: when I go back to the BE and select 'Clean
temp_CACHED' and 'Clear All Cache' and then publish again, it works
allright.

(issue imported from #M77)