I'm trying to install Wordpress Mobile Pack into a fairly simple WP installation (www.focus.org.uk).

Viewed on an iPhone, the server correctly identifies and serves the mobile version of the site - but it also displays two error messages above the main page text:

Warning: array_filter() [function.array-filter]: The second argument ‘Array’, should be a valid callback in /home/focusorg/public_html/wp-content/plugins/wordpress-mobile-pack/plugins/wpmp_transcoder/wpmp_transcoder on line 363

and a very similar warning about

implode() [Function.implode]: invalid arguments passed in /home/focusorg/…. on line 389

I have tried disabling the other plugins I'm using, and this does not make any difference.

Any ideas?

David