1. I get this message at the top of the settings screen
Warning: exec() [function.exec]: Cannot execute a blank command in ...\wp-content\plugins\wp-mediatagger\mediatagger-lib.php on line 928
2. Everytime I click... well almost anything, it's logs me out of wordpress, showing the WP login screen and then and I can't get back in, I have to close the browser and start again.
This url it displays in the address bar.