OK, today I went out... I tried the tablet in the Mall, but Sky Safari and the Mobile Observatory still won't work with GPS and the compass or gyro? GPS works fine: I tried Sygic and it told me exactly where I was sitting.
Luckily Google Sky Maps works fine with GPS though, so at least I have something I can use, but I would be curious to know why the other two applications won't work with GPS? I was even connected to Wi-Fi in town, although it is not necessary for them to work with GPS.
Any thoughts/help would be appreciated.

Cheers,
OSG