My client has multi-currency functionality turned on, but they aren't using it.  They have encountered rounding errors in AR and other modules due to this, and they want to turn the function off.  I had a client that wanted to do this a few years ago, but when they tried it, they had all sorts of issues with their historical transactions (vouchers, etc.), and had to turn it back on.

Does anyone have any experience with doing this, and what the effects are?  I thought there was a white paper on this somewhere, but I can't find it.

Thanks!