Just downloaded & installed v4 for the first time, using the wysiwyg zip.
All installed & configured OK, but the ckeditor doesn't show in the add/edit articles dialogue. I've re-checked all ck files uploaded, and "Enable WYSIWYG editor?" is set to Yes.
Everything seems to work OK, but there is no editor toolbar, and no gap between "Article" and the text ... and no 'expand tool bar' arrow (as in the demo).
Is there another setting or installation routine I've missed?
After a conversation with Chris (in which he showed me it worked fine for him) I checked other browsers and they were OK. I even checked Firefox (which was giving the problem) on another PC and that was OK too. I restarted Firefox, and it now works OK.
I've no idea what the problem was to start with, and I don't think Chris made any changes to my set up ... so it's complete mystery.
My apolgies for not posting to say the problem had gone.