Anybody used easyadsenser?

Hello

has anybody used the Easy AdSenser plugin on WPMU? I am using it in a couple of WP blogs and it works great, however on WPMU it seems to go crazy: I create all settings from the admin side, then activate it site wide however it will not update and will keep placing ads in the middle of posts, the sidebar widget although activated would not show, if I remove the link to the plugin website it would still show it and so on, any idea anybody?

Also, any suggestions for viable alternatives?

Marco