Update to this.
I disabled the Remove Query Strings from Static Resources plugin and reactivated EWWW. Now, instead of getting the above error, when I clck the Bulk Optimize link, I just get a blank white page.
My status and debug info is here:
http://pastebin.com/UaQXv3r5
J
+1 on this problem
Fatal error: print_r(): Cannot use output buffering in output buffering display handlers in /home1/ab47903/public_html/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 253