Here's an FYI....
Last week I went to:
http://www.stromma.se/en/STOCKHOLM/Combolist/?tag=hop-on+hop-off
and ordered 4 HOHO combo tickets. It came to $146.02 and I paid for it with a Visa debit/credit card. The next day I was in Sam's and when I went to check out, my debit card was denied! Yikes! Of course, Sams does not take a regular Visa, only a debit card. I asked if they had an ATM and they did. I went to the ATM and had no problem at all getting out cash. I paid for my groceries and then called my bank with a WTH?!
They told me to hold while they transferred my call to the "fraud" department and I immediatly knew what happened. When they got back on the line they said there was a charge from a foreign company in Sweden and so they put a freeze on the card. I said their freeze must not cover ATMs and she said that was correct...because with an ATM that means you physically have the card. I told her that was a legitimate charge and she released the hold. I thanked them for doing this as I think it's a good security measure.
Anyway, just remember to call your bank before you travel over seas to tell them you will be out of the country and not to freeze you account when they see a $200 charge at the Oslo Sweater Company or the St Petersburg Gift Shop.
~Mike