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I came across an unusual question on Meta today:

I went to vote up some of the comments but couldn't:

enter image description here

I found some other questions on the matter:

I believe the real reason is because of the migration: comments left before migration can't be voted on (or flagged, which I think is likely a problem) on the new site. Is this in fact the reason? And if so, could the little red box say so?

This comment is from another site and not eligible for voting or flagging

This comment is from another site and not eligible for voting or flagging

Would save a moment of confusion, right?

share|improve this question
Do I Notice MS Paint here? – hjpotter92 May 6 '13 at 11:44
Paint Shop Pro 4.14, copyright 1997. If it ain't broke, don't upgrade :-) – Kate Gregory May 6 '13 at 11:49
Anyone know why I don't see a list of Linked Questions on the side of this question when there are links to 4 questions in it? I only see the Related list. – Kate Gregory May 6 '13 at 11:51
I don't think comments from migrations are protected in any way, I suspect what happened is that you tried to vote after the question was closed. A migrated question that is closed reverses the migration and locks the question (which you can't see as the migration and close banners occupy all notice slots). – Mad Scientist May 6 '13 at 12:00
Thats weird. I changed one of the links and now all of them show up in the linked posts. – AsheeshR May 6 '13 at 12:02
It's not because the comments are from another site, it's because the post is locked (invisibly) when migrations are rejected. I thiiiink it already tells you when comments aren't eligible for deletion by flagging, but locked comments could definitely use a better error message. – Ben Brocka May 6 '13 at 12:21
This error also happens when you're trying to remove your own comment from the proposal which is in Commitment phase. So the message should be far more general than than to include invalid votes and removal operations. – kenorb Jun 3 at 16:24

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