It’s been 3 months since I signed-up for Vodafone’s 3G Broadband Connection and I can say that I am quite satisfied with the service so far. However on my MacBook I started experiencing problems with the Vodafone Mobile Connect application: it hangs upon start, apparently without a specific reason.

It’s been like that almost since I have started using the service, however lately it has been happening very often.

The solution seems to be rather easy, as pointed by another MacUser: delete a single file:
/Library/Application Support/nova media/VMC/ppp_session.log