Which badge is the rarest?
72839
Which is the badge awarded to the least amount of people?
22775
Analytical Badge - Can this be marked "(Retired)" or something?
49678
Wording of Convention Badge
20825
Weird badge (probably encoding issue)
10398
Should the Precognitive badge be listed in the list of S[OFU] badges?
60605
Is there going to be a Popular Profile badge?
88417
Tag badges are re-awarded for some users
78192
Necromancer badge given based on merged duplicate instead of master question
83321
When "exactly" is the Yearling badge awarded?
116714
How to treat rare / new items in the validation of a recommender system?
51396
Seem to have lost 4 Silver badges and 10 Bronze badges
24497
Badge progress indicator missing number counts
78107
"Notable questions" badge page and search report different numbers for questions with 2.5K views
150115
Can I forbear a badge?
104719
Skins that cannot be in mystery gifts?
127507
How to distinguish between gold, silver, and bronze tag badges on SEDE?
79413
"Informed" badge on meta