I may as well repost some of the thoughts I've had here. I think I may have emailed you [Simon] with some as well, but I may as well summarize in one place. Most of these are not so much bugs as much as suggestions.
• Having the 'list' feature of BBCode enabled would be handy and not likely to be abused, but I suppose the bullet character I'm using here would be fine.
• Unicode characters used in 'first name' & 'last name' fields display correctly in the forums, but not in the 'profile' page after saving.
• A 'skip to last page' link on the thread list page for threads which have moved over into more than one page of replies would save time and site traffic. I see that by clicking the 'Last Post' link, you can do this already, but that's not clear to most people I feel.
• There's my calendar idea found here.
• Remove the subject field from replies, as well as move the poster information into the same gray bar as the actions (report, reply) links.
• The 'Go to Top' link is redundant, as it is the same as clicking the name of the forum category you are in which is found just above it.
• The 'Go to Topic' link is redundant, as it is the same as clicking the '1' link. Obviously not a big deal, but more open screen space is always a good thing.
• I don't remember if the 'Most Recent Poster' data is available to the template, but it could be neat to have the 'alt' tag of the 'Last Post' link contain the name of who most recently posted, so it could be moused-over.
• Maybe move the 'Private Messages' link to the user area ('logged in as ___ | logout') as it doesn't really pertain to the forum you are currently viewing.
• When a video is embedded into a post, the dropdown menu's (longer ones like 'branches' for example) are under the video. I think this can be fixed by playing with the z-index of the embedded videos.
• Previewing a post, one's username is not displayed in the parenthesis, but an image with an invalid src and href is displayed.
• Perhaps the edit box could take up the full width of the horizontal white area, and maybe even increase its font size.