When I used to be a tour guide in Europe there was a pretty common scam in Prague that groups of 2 or 3 men would approach unsuspecting tourists and tell them they were the police and demand to see passports. They would then find a problem with the passport and need to confiscate it. You would then have to pay an exhorbitant "fine" to get the passport back.
They tried it with me a couple of times but since I was aware of the scam I told them to buggar off very vocally.
That was a few years ago now though.
If you can get out to Carlovy Vary - it is well worth a day trip!!!
Enjoy
_E_E_EE_E__EE_E_E_E
Only had my luggage lost once. That was coming from India to Melbourne via Singapore. I lost my flight and ended up staying til the next night but my luggage stayed even longer. No big deal, it found me eventually.