Originally posted by Cab Bernet:
Before there is a problem? Most wines in shops are upright, so I assume it's not a big problem.
Most wine in shops is drunk within a few hours of purchase.
Most decent wine shops that I know have the majority of their stock - especially the stuff meant for ageing - lying down.
There are no hard and fast rules. If it's something new that you plan to drink within a short period - a few weeks or even months - I wouldn't fret too much about it, but if it's a prized bottle that you plan to keep for a long time then personally I wouldn't risk it.