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Background Pony #62CA
As far as I know, the site automatically adds the tag oc when adding any tag beginning with the characters oc: without needing a tag implication set up - and it even works when the tag beginning with oc: is itself added due to being an implication of something else. I’m not sure exactly when that was implemented but I remember it being true for a while, and if I’m looking at the the correct section of the source code, it was committed in Nov 2019?
It’s with that in mind that I’m wondering if there is, or temporarily was for periods of time, bug(s) where that might not happen? I’ve come across a few images where an OC tag was added but oc was not - not counting times that oc was removed by a user, and neither do I see that the image got merged, which could have played all kinds of havoc. Some of the cases are when the oc: tag was added by a moderator, and sometimes by the anonymous uploader (which means it could have been a moderator, in case that is the source of a bug, but it is not knowable to regular users like myself.)

Background Pony #62CA
Am I mistaken that first_seen_at should be the oldest date out of any merged posts, or is this just a case of old posts not getting data indexed after some update, or is there a bug?: the API response for >>147342 has a first_seen_at newer than its created_at, which is also borne out in a search.
Background Pony #8E63
Some tags cannot be easily removed.
The raw image url was accidentally copied into the tags, and it took a mod to remove it. Attempting to remove it normally does not work.
Background Pony #62CA
Spoiler tags don’t work around an unordered list, but the UI tries to do that if you select the list and use the spoiler button.
||- unordered list
  • unordered list
  • unordered list||
1. ordered list
2. ordered list
3. ordered list
||If there isn’t a double line break, it fails at spoilering the first line, too.
  • unordered list
  • unordered list
  • unordered list||
||That also breaks it for ordered lists.
  1. ordered list
  2. ordered list
  3. ordered list||
ZONESS
Elements of Harmony - Had an OC in the 2022 Community Collab
Non-Fungible Trixie -
Preenhub - We all know what you were up to this evening~
Twinkling Balloon - Took part in the 2021 community collab.
My Little Pony - 1992 Edition
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
Cool Crow - "Caw!" An awesome tagger
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends.
Magnificent Metadata Maniac - #1 Assistant

Can’t fix the artist tag on this entry: >>2828155
For some reason it’s displaying the artist by an old name that was aliased into their most recent artist tag. I’m unable to add the correct artist name or remove the incorrect one.
Background Pony #F5C7
@ZONESS
When an aliased tag somehow ends up on an image, it kinda messes up tag changing until it’s unaliased.
This can happen if the alias is implied by a tag, but that doesn’t seem to be the case here. I’m guessing that, in this case, it’s because of the alias artist:thegreatcat14artist:strawberrycat14artist:queentigrel, where artist:thegreatcat14 should have been aliased straight to artist:queentigrel instead.
I’m not sure whether that’s how that works though. Just in case, a list of aliased tags which have an alias for the mods.
Background Pony #5D2C
Got new comment notifications for >>2826715, >>2826706 and >>2828034 but the image pages display less comments they say there should be (0 comments instead on 1 on the first two and 1 comment instead of 2 on the last one).
Blissful690

Izzy is best G5 pony
Don’t know if it’s already been mentioned here, but DA fetch doesn’t bring back the full-scale image. It only uploads a scaled-down version of the image (e.g. an image that was originally 3000 x 2400 pixels is fetched as 1280 x 1024 pixels). Is there any way to fix this?
Ciaran
ラ・ゼッタ - For supporting the site
Princess of Love - Extra special version for those who participated in the Canterlot Wedding 10th anniversary event by contributing art.
Tree of Harmony - Drew someone's OC for the 2022 Community Collab
Elements of Harmony - Had an OC in the 2022 Community Collab
Non-Fungible Trixie -
Magnificent Metadata Maniac - #1 Assistant
Kinship Through Differences - Celebrated the 11th anniversary of MLP:FIM!
Verified Pegasus - Show us your gorgeous wings!
Preenhub - We all know what you were up to this evening~
Philomena - For helping others attend the 2021 community collab

Moderator
友情は魔法だ
Ah. Found what happened.
Sometimes if there’s a tag with an alias, such as
Puppy -> Dog
And someone aliases both of those to a new, third tag, thus:
Puppy -> Canine
Dog -> Canine
Then the Puppy -> Dog alias remains but is not visible in the normal public view of the tag and only shows up if you edit the tags.
This is an easy mistake to make, because the UI for aliasing looks like it is offering to EDIT the alias. So if you ‘edit’ the existing Puppy -> Dog alias to Puppy -> Canine then Philomena creates a new link leaving the old one in place.
So you end up with aliases that have aliases, and … well, on BoR this was a horrific situation with infinite loops, but Philomena seems to be ok with it. Although I’m not sure what would happen if a tag had to be aliased in one of these weird cases.
For anyone else working with Philomena, the current solution is to first
  • open all tag aliases on a tag
  • Remove all of the aliases
  • re-add new aliases from scratch.
Again thank you for reporting these, I’ll keep working on fixing them.
☬ ᏝᏆᏁᏨᎾᏝᏁᏰᏒᎬᎳᏕᎿᎬᏒᎱᎯᏁ ☬
Best Fans Forever - For supporting the site
Nocturnal Vision - For supporting the site
Princess of Love - Extra special version for those who participated in the Canterlot Wedding 10th anniversary event by contributing art.
Magnificent Metadata Maniac - #1 Assistant
Elements of Harmony - Had an OC in the 2022 Community Collab
Tree of Harmony - Drew someone's OC for the 2022 Community Collab
Non-Fungible Trixie -
Kinship Through Differences - Celebrated the 11th anniversary of MLP:FIM!
A Really Classy Artist - 250+ images under their artist tag
Happy Derpy! - For site supporters

Lincoln Brewster time
Not really a question but the Derpibooru server was just down. Just wondering if anyone else dealt with that. :o
I guess it was just for a maintenance check. :)
12 minutes later:Server just dropped again, don’t know what’s going on D: I’m currently signed in on the regular browser as well as incognito, but my incognito one just went to server error. :(
Technical details only shows ::CLOUDFLARE_ERROR_500S_BOX::, no ray ID as usual to fix. :(
Now it’s back to working again. Needs to be sorted out :o
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