If you visit SUP journals, your username may be logged
Recently SUP has given SUP users (Russian and other cyrillic languages) a new feature: see the last 100 users to view your journal. (you can see their usernames, which makes this feature different from just using a counter on your journal, which would just give you the IPs) However, it seems that non-SUP LJ users will also show up on these lists.

After SUP users complained, SUP said they would in the future offer an opt-out. If the SUP user opts out, they will no longer appear on the lists, but they will also no longer be able to see who visits their journal. So far it's not clear when this opt out will be available.

According to this comment, SUP will allow non-SUP users to also opt out in the future.

Until then, if you visit the journal of an SUP user and don't wish to be logged, you must log out.

For more info, see this post: http://community.livejournal.com/ljspeaks/1655.html

(BTW, if you choose to comment on that post, please read the LJSpeaks statement of purpose and rules before commenting. )