FAQ notes

[Havoc Pennington]

Jeroen T. Vermeulen wrote:
> 
> In a situation like this, I might be tempted to fire off two asynchronous
> calls to foo and bar, and then await responses for both.  Does d-bus
> guarantee that the calls will arrive at the object in the same order in
> which I sent them off?
> 

This is guaranteed. But it doesn't guarantee the replies come back in 
order, just that replies come back in the order that the recipient 
process sends them, which is up to the recipient.

Havoc