There are three issues:
1. The "default" user image (avatar of users that didn't choose their custom image) is hosted on "i2.wp.com", but a copy of it already exists on community.casiocalc.org. Are we using a external host? Whether this is the only occurrence or there are more files like this, should they be moved to the current domain?
2. This bug: Editor sometimes shows you plain text with html tags instead of the BB-code and preview. I always thought it's just my internet so didn't report earlier.
3. I almost forgot while writing the above two The site's source contains <style> tags with massive content; must be a theme problem? Can these be moved into their own css files?