Actually, I hadn't noticed the Moodle favicon. As to the powered by Moodle credit - I hadn't even noticed that it wasn't there. It used to be on other themes, so when I installed Essential, it may have changed? I'll see what I can do to get it back.
No problem giving credit to Moodle. In terms of the 3rd Party plugins... that's very good point. I think there should be a way of demonstrating credit to those who created and maintained the plugins. Not 100% sure how that would work. I remember in the days I was working with Joomla, some of the extensions actually did put a credit line on the user-facing display - and you could remove it (for most) by going 'Pro'.
Anyway, I think my point still stands - for something that significantly alters the way the site functions (like most plugins, I guess), if it's possible to include a credit line without affecting the functionality, then so-be-it.
Good to see some discussion going on though - this is one of the age-old questions when it comes to FOSS.
Part of the credit, by the way, is so that I can say "No, that's a 'feature' of the theme... and I didn't make it!"
Thanks!
Richard.