I sometimes can upvote twice...bug?

[ptn]

On the main page, I upvoted a story and then opened the comment thread and I could upvote it again. It only worked on some stories. I then went to 'new' and tried it there, and there too it worked on some only. I haven't tried the other way around (first upvote from comment thread and then from the list of stories). Is this a bug?

[pg]

The http request for the first vote was probably still being processed when the second page was generated, so it still produced the up-arrow. When you clicked on it, though, the second vote would have been ignored by the server.

[johngunderman → pg]

This has happened to me on numerous occasions. I've checked the numbers before and after, and PG is correct; the second vote is ignored.

[ptn → pg]

Not in my case, I gave the new two points.

[pg → ptn]

The Javascript on the page always seems to increase the score. You have to reload to be sure if it did.

[ptn → pg]

Oops, yeah. Not a bug then :P

[wyatt]

Can everyone trying to check do so on this comment? It would be much appreciated :)

[icey → wyatt]

Well, downvoting works.

[wyatt → icey]

now that its confirmed that downvoting works, maybe you should try upvoting like OP and check