USB HDD not being seen since upgrade

[Peterjay]

I've just upgraded to XBian 1.0 Beta 1.1 from Alpha 5 and now when I plug in an external USB HDD it is not being recognised, until I go to file manager and add it myself. Also, as I have several HDDs I've only been able to successfully add one. The others are seen in file manager but the contents are not visible. All HDDs are inputted through a powered hub.