I get a fair number of packages from Australia - mainly documents and data CDs - and have found that a few of them that haven't come via Fedex have been opened by Customs officers over the years. I'm told it is simply random checking, and to be honest I find it quite reassuring.

onthelimit1. While they are opening yours they are leaving other people's alone. I think you have just been unlucky. I can remember in the fifties they opened nearly every parcel I sent home to my wife. They also opened a Parker 51 pen which I had bought years before and had sent to Canada for repair. I think it was still under guarantee. HM Customs wanted to charge me on it, thinking I had just bought it. Luckily I was able to post them copies of the receipts and guarantee.