A error message generating the SiteMap

[hameau]

Well that makes no sense.

GSDONOTPING gives an error about pinging ?

Yes, it always has (since the advent of GSDONOTPING).

Sorry, I see I had it in my notes to report it at the time, but it must have slipped through the cracks. I'm just testing now to see if it's plugin related.

Edit: Yes, it's down to mvlcek's I18N (specifically, I18N Base), which takes control of the sitemap generation. With no plugins, it's all good.