Attempting to change name/save reg details page results in "Sorry, an error occurred"

[slightlyglitterpaned]

Looking at the response from the registration-details post, it's a 500 Internal Server error.

Also, getting a 404 response for the Mumsnet logo on that error page, but that's just prettiness. I can cope without that

Hi slightlyglitterpaned - are you still having trouble today? Are you the desktop site?

Yes, using the desktop site. I can actually change it using the mobile site on my phone, but get the same error using the mobile site on my laptop.

Browser details for laptop: whatsmybrowser.org/b/DIGOKUQ

For mobile, where nc works, also Firefox but version 43 not 42

whatsmybrowser.org/b/3ZJR1DP