[Plugin: BuddyPress Mobile] can`t see "update post" button

hello,
I want to use the mobile theme especially with my activity stream.
if I write s.th. in the post box and then want to send it I can´t see the “post-button”… has anyone else the same problem?
how to solve this phenomen?
thanks, bergblume

http://wordpress.org/extend/plugins/buddypress-mobile/