Yes, seen it quite a lot.
Most often has been when AW has taken it down due to verification problems or when a touring prossie has returned home for a while and the profile of taken down rather than being parked in the last place they worked from.
The more annoying thing is when a profile vanishes, leaving me trying to work out what one has gone from the HL and then returns with a new name and new pictures, leaving me wondering where the fuck it sprung up from and how it got on my HL.
Pity you don't have any other contact details for her, just keep checking and if she's for real she may well come back.