Shipping amps upside down?


I recently recieved a used amp that was shipped upside down. The sender will remain nameless as he is a decent guy and went out of his way to get it to me quickly. However the fact remains that the address label/postage was on the bottom of the box (which was the top for the entire trip, even with all the *up* arrows pointing the wrong way) The trip was probably close to 3000 miles, but was shipped essentially 2 day air. I cannot hear any parts rolling around and it performs like it is supposed to as far as I can tell (but volumes are low right now as the wife and kids are sleeping) I have heard horror stories about electronics being shipped upside down. But in my case should I worry or not? The amp is SS but it weighs in at 50 lbs. Could there have been damage that will show up in the near or far future? If I sell this amp in 2,5,10 years should I still be concerned about it? Sending it back to the factory for a check-up probably involves another 6000 miles of travel. Would more harm than good be done by that?

It just bothers me to have to worry about something like this.
a71spud
if it plays don't worry about it - most high end stuff is built like a tank, especially amps and speaks.
Sad to say, but I too think Sc53 is right on. Personally I wouldn't worry about it unless the amp was malfunctioning. Good Luck. Craig.
I get a laugh (cry) everytime I visit my local FedEx Truck Depot to drop off a package. In the lobby there is a photo of one of their large sorting centers, probably the national hub in Memphis. I guess it's there as a way to show off their operation. Near the center of the photo there is a really large JVC Television box (probably a 32 or 35 inch set). It looks definitely like an OEM box (ie, its not Aunt Margaret sending her Christmas gifts.) Well the box is upside down. I wonder who at FedEx chose that picture; they must have been asleep.
I wouldn't be too quick to dismiss the potential of an upside down effect. I recall a mid-70's article in one of the Russian aerospace journals that referred to "capacitor confusion" resulting from quantum acceleration phonomena. Something about discontinuous gravitational fields. This may be one of the factors involved with "break-in". Anybody doing any controlled listening?