OK, sorry, was not paying attention there for a bit.
I tried latest trunk mythbox fetched from Hg on Ubuntu 10.04/XBMC Dharma Beta 4
Clearly I am still doing something wrong: it still does not work for me, at all. It hangs before I ever get to the settings screen the first time.
I get the mythbox logo. Then a popup telling me SQL connection failed (which is hardly surprising since I have not explained to it yet how to connect to the database).
Then I get the screen start to draw, and the spinning "play" icon will draw a few green segments. Then hang. XBMC has to be killed.
This is slightly different from my XP experience, but not hugely.
XBMC debug log here:
http://pastebin.com/uaCCXWqK
What else different from default? I have XBMC user profiles setup. I have a bunch of Dharma plugins installed, all work normally. I "installed" mythbox by linking to the checkout dir from addons as analogue explained up there a few pages back. I have created a scripts_data dir by linking to the addon_data dir as suggested elsewhere here.
I am running on the mythtv backend (separate machine) mythtv 0.23-1 fixes branch, built from source. Myth frontend on the same machine as XBMC also built from that branch. Working fine. Myth backend is running.
Any hints accepted, but I can only poke about at this in the evenings so there will be a delay in replies.