[Plugin: wpSearch] Conflict between WPSearch and Headspace2

While trying to figure out the problems I had getting the WPSearch index to build, I found a conflict between WPSearch and Headspace2.

They both activate but the Write screen is broken. Scroll down to the tags section and I see the following error:

Fatal error: Cannot redeclare class PorterStemmer in /home/buildip0/public_html/test/wp-content/plugins/headspace2/modules/page/tags/porter_stem.php on line 24

The Advanced Options portion of the Write screen are also missing.

Try to save a new post and I get the following:

Warning: array_filter() [function.array-filter]: The first argument should be an array in /home/buildip0/public_html/test/wp-content/plugins/headspace2/modules/page/javascript.php on line 84

Warning: array_filter() [function.array-filter]: The first argument should be an array in /home/buildip0/public_html/test/wp-content/plugins/headspace2/modules/page/stylesheet.php on line 94

Warning: array_filter() [function.array-filter]: The first argument should be an array in /home/buildip0/public_html/test/wp-content/plugins/headspace2/modules/page/javascript.php on line 84

Warning: array_filter() [function.array-filter]: The first argument should be an array in /home/buildip0/public_html/test/wp-content/plugins/headspace2/modules/page/stylesheet.php on line 94

Warning: Cannot modify header information - headers already sent by (output started at /home/buildip0/public_html/test/wp-content/plugins/headspace2/modules/page/javascript.php:84) in /home/buildip0/public_html/test/wp-includes/pluggable.php on line 770

The post saves but, with the missing Advanced Options section, publishing it results in comments being disabled and no ability to set the excerpt (among other things).

http://wordpress.org/extend/plugins/wpsearch/