Problem with bitcoin trading on MtGOX

[Fredrik Persson]

The bitcoin cryptocurrency is traded on a site called mtgox.com. However,
tracking the mtgox account in gnucash is very difficult. The user balance of
bitcoins (BTC) and USD are tracked with a precision of 1/1000. You can spend
0,001 USD.

Currently, it is not possible to do anything with a 1/1000-th of a dollar in
gnucash. So one must fall back to a solution where a "MTGOXUSD" commodity is
set up which can be used instead of USD on mtgox.

Also, the bitcoins themselves must be tracked as a commodity (lika a stock
or mutual fund).

This gets very cumbersome and does not at all look very good.

Could this be a case for user defined currencies in gnucash?

/Fredrik Persson