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I just edited the title of this question, and noticed that the tag had been changed to .

When I go to edit the question, remove , and add , it makes no difference.

Here's a short [unlisted] YouTube video, demonstrating the problem.

What's going on? I'm using Google Chrome v26 on Windows 7.

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Well, it appears to be a synonym tag, as seen here. – Daedalus Apr 30 '13 at 7:40
@Daedalus Strange, since the tag preview shows them to be distinct! – Danny Beckett Apr 30 '13 at 7:41
@J.Steen See above. – Danny Beckett Apr 30 '13 at 7:42
Could you perchance add that image to your question, for ease of viewing? – Daedalus Apr 30 '13 at 7:43
@DannyBeckett Did you purposefully remove the "also: img" beneath the image-tag preview? ;) The visual clues are there. For the img-tag, the entire word is highlighted. For the image-tag, it isn't. Instead, at the bottom, it says "also: img", and the img in that label is highlighted. Yes, they're stupidly subtle visual cues, and they should be improved, but still. =) – J. Steen Apr 30 '13 at 7:43
@J.Steen Not purposefully :p I use Greenshot, which gives me a crop tool automatically when I press Print Screen. I just cropped to the descriptions. The entire img word is highlighted, because I typed img in the tags box. – Danny Beckett Apr 30 '13 at 7:45
@DannyBeckett Yes, but nothing in the image-tag-name is highlighted except the "also: img" at the bottom. It's subtle. But it's there. =) – J. Steen Apr 30 '13 at 7:46
Basically, the tag preview will show you target-synonyms of a synonym'd tag that you've typed in to help you pick better tags. – J. Steen Apr 30 '13 at 7:47
@J.Steen But why does img show at all, if it's a synonym? And with a different description? If I typed cpp, then both c++ and cpp wouldn't show. Only c++ would. – Danny Beckett Apr 30 '13 at 7:47
@DannyBeckett Oh, well. That I can't even speculate at. Sorry for the mixup. =) – J. Steen Apr 30 '13 at 7:48
@DannyBeckett Funny. On the synonym page, if you hover over the img tag, it shows the correct description (the one for image). Maybe it was a resent synonymisation and the preview data is still cached? – J. Steen Apr 30 '13 at 7:51
(As an aside, to prevent image rot, please use the Stack Exchange image upload, not the public Imgur service.) – Arjan Apr 30 '13 at 8:19
@Arjan When commenting, there is no way to upload to SE's Imgur. It is also not possible to upload by browsing to - Futhermore, when I added the image into the question itself, it is automatically uploaded to SE's Imgur anyway. So I don't really know what you're getting at? – Danny Beckett Apr 30 '13 at 8:20
The image in your question was NOT at the Stack Exchange Imgur account. (For commenting, I always upload the image using the "Your Answer" box, and then copy the URL.) – Arjan Apr 30 '13 at 11:11
Doesn't look like a cache issue; 3 hours later and still shows the tag wiki for img (which you can even get an edit link for), looks like a bug. – Wooble Apr 30 '13 at 11:25
up vote 5 down vote accepted

When a tag becomes a synonym of another tag, the questions under the tag do not get automatically retagged to the new master tag (in case the tags get un-synonimized, the damage isn't too great). So, there are still 1,300 questions which are still explicitly tagged with , which is why that tag still shows up (it's there, you just can't technically use it now).

Since it's now a synonym of, all new requests to use the tag will automatically be retagged to that master.

The only real problem here is that they don't provide us with any way to explicitly search for the synonymized tag to even be capable of manually retagging them to the master (or removing the tag if it's not a valid use), since it will automatically redirect the search to the master. So, if a moderator never ends up merging these tags, the tag will always be displayed there (unless by chance users end up editing all 1,300 of those questions to have them retagged).

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