[Plugin: WP-Prowl] Fatal error: Line 4

First, make sure you are up to date on your wordpress install, and all plugins including wp-prowl.

This error is almost always due to another plugin causing a conflict, which causes my plugin to be loaded twice. If you’ve made any changes to my plugin code, I’d suggest re-downloading and reinstalling wp-prowl, deactivating all other plugins aside from wp-prowl, and then seeing if the issue still exists. Once you’ve determined that wp-prowl works, re-enable your other installed plugins one by one, and see when the issue reappears.

-nate