inviting friends with skype error - message "null" sent

today i sent invites out with skype, but as the skype windows opened there was only the message "null" sent - maybe the update wuala installed today did nothing good to skype inviting...
however i could recover the invites under the friends page by opening an invited friend, read the message that should have been sent and resend them manually.
but still it's much more comfortable to let wuala do the work ;)