[ars]

I think you have two ways of dealing with it:

51/49 split, or have 3 partners.

Both methods ensure you never end up with a stalemate.

[jws]

You can always fall back on a shotgun clause for a cleaner ultimate solution. http://en.wikipedia.org/wiki/Shotgun_clause

[shykes]

With 3 partners, the typical nightmare scenario is that one partner is marginalized or kicked out by the 2 others. I've seen that happen and it's ugly.