Cache contents problem

I have no problems with wp-super-cache doing it’s job. It’s great. However, whenever I click on the admin page link I get an extensive list of foreach() errors.

This is the error I just received:

Warning: Invalid argument supplied for foreach() in /home/****/public_html/wp-content/plugins/wp-super-cache/wp-cache.php on line 880

This repeats, from what I can tell, for every entry in the cache. I also occasionally get this error too:

Warning: Invalid argument supplied for foreach() in /home/****/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 245

I’ve noted in the code this references directory listings, but am unsure as to what I should do about it.

Like I say, this doesn’t affect the overall running of super cache (that I can tell!), but is an annoyance as it likes to fill my logs up!

David