An unknown number of frustrated Skype customers have been pestered by spoof messages on the Microsoft service for weeks, but the company is yet to close what appears to be a gaping hole in its software.Instead, Redmond has advised Skype users to change their account passwords. But complaints are building up about the lack of communication coming out of the Microsoft camp regarding what seems to be a Skype security flaw.The problem first appeared late last month. One Skype user, posting in a thread that now runs to 22 pages long, said: I received a message earlier today from a...