Certainly not. That's why I asked DC members to verify if it's only me. And yes, it's only me, so I'm pretty sure they won't care. Also, it applies to DC forum solely, so I can tell you what the reply would be: Let the DC forum guys correct theirs pages!
Why not, I submitted two weeks ago a problem I have in this same forum, when marking some posts as read. They're marked, but the marks are not cleared when the page updates itself, so they're "inherited" by the next items in the list. It did not happen in Opera 9.27, so either it's a problem with Opera, or a problem with the forum software (or mouser mods :D)
If the problem appeared with the new build, I think it's probably a thing of their own, maybe they broke something in the wand, or in the cookie management. Not that SMF or DC are perfect, but well, they worked before. Also, the Opera team contacts the people working in pages that do have problems with Opera (if this is the case), or least that's what they say...
Then again, if you do a clean install and the problem disappears, something went wrong in your setup (unless something external is causing it). If not, time to bug them :)
Regarding the Opera forum: I used to write there several times, but I've never receive any valid answer, if you don't count ironic, arogant and sarcastic comments. This is a "normal" forum, not even remotely resembling the constructive atmosphere here at the DC.
Yeah, that's why I told you to use the bug report wizard as the first option, since this goes directly to Opera's bugtracker, which is only available to Opera employees as you may expect, so you don't have to endure through the jungle that seems to be Opera's forum. Not that I lurk many times there, but I saw enough posts, and hear enough stories of frustration to know that its fame it's deserved.
Of course, as any big forum, there are nice people as well, but a share of fanatics and trolls is unavoidable.