[Plugin: WP RegEx Replace] Conflict with W3 Total Cache?

Hi. We use the regex-replace extensively. But with W3 Total Cache, which we also need!, the regexp does not seem to work.

Any ideas on how to make it work? What is W3 doing that’s interfering with simple “ob_start()” based text replacements in this plugin?

Thanks for any help or ideas.

http://wordpress.org/extend/plugins/wp-regex-replace/