Well, its as good as confirmed for me. At about 3 I made a missed call to the phone at home in order to find it (easier then going to the dect base and pressing the button) - there was enough credit on the mobile to call thru without the voice telling me about the length of time left - I estimate about $8 or so,
At about 10:30 I go to text my flatmate to get some milk, doesnt go thru, text 777 and get back a balance of 1¢... Nothing in the calls, mms, or txt since then to explain where it has gone.
Gonna call tomorrow to see if they can explain whats happening, but I am not impressed, this is exactly why I should be able to access a history of charges on the my vodafone page.