That's the downside of accidents sometimes - when you can't follow what you did.
Merging layers is evil - at least if you can't go back. It's why I merge everything to a new layer. I can keep all my previous one (and group them if there are too many - best part, all I need to do is give the group a name and call the new layer "merge " and I know for which step it is :D)
I've tried different sharpening methods, until I first started understanding unsharp mask and how it gives you so much control. Just the upper setting was enough to understand initially. I rarely change the other two (threshold and radius). I have radius at around 0.4 or 0.5 (I originally learned from it in a tutorial where they said something about a pixel/radius ratio or so and calculated it down - I don't think I bookmarked that though)
That he is :D I think I first saw him in that Robin Hood movie... and also I can't say I loved him (I wasn't old enough to love enemies ;D) I now love his role there :D Not to mention all those others he did :D
(and the reason for the current response - posting the remidner made me remember you asked a question... and try and find your comment again) I'm tempted to say just Torchwood - but since I'm tired and feeling like I can't say no to you... could you repeat the question over at the challenge post? Just so everybody can see my answer to that question. (which in case you didn't notice was: go ahead :D)
Don't worry... I'll eventually get to answering all of them. But for now I'm too tired. I think I copied links for the season20in20 voting for over two hours. I'll comment on your icons (in the comment below) some time tomorrow. There's also a halfwritten reply to your Doctor Who post on LJ I think (- Sanctuary sould be up next I think... I can't keep track right now.)