Nice work, Don.
The grey border surrounding every post is a bit too distracting, try going for same colour as the post box or inbetween that and the background to make the boxes more subtle.
The bookmarks/posting permissions boxes at bottom don't have red bars.
Move the online/offline icon off the name (maybe to the bottom bar of post box) to make it easier to read, or have it changed to make them more subtle (smaller or dimmer green circle)
When the yellow auto-save thing pops up while you're writing a post, it's unreadable - can't see 'auto-save' or what it was supposed to say.
For the thread list, having both thread title and 'Started by...' line of similar colours makes it too crowded, try darker colours for the second line. Or swap around the colours.
When editing a post, the text box goes all white when not selected. Quick reply box goes black when not selected.