Title kind of says it all. From the jist of it, it seems people have had their gil that is currently on their character (but not on their retainer) stolen somehow after checking the Market Board. Or something similar. Click on the link below to read further details.
http://forum.square-enix.com/ffxiv/threa...rket-board
http://forum.square-enix.com/ffxiv/threa...rket-board