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Forums / BUG: Changing WordPress.com username mishandles uppercase

BUG: Changing WordPress.com username mishandles uppercase

  • Unknown's avatar
    feyandfortune · Member · Aug 6, 2026 at 7:35 pm
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    Repro steps:
    * Navigate to account page, type in new legal, available username (e.g., “ThisIsACoolLongNewName”)
    * See “Nice username!” message under the text box
    * Confirm the name by typing it again
    * See “Thanks for confirming your username!”
    * Click “Change Username” button
    * See dialog warning about effects of changing username
    * Click [OK]

    != Black toast message floats up from bottom of page: “Failed to update username.”

    * Retry using all lowercase characters in HTML form (e.g., “thisisacoollongnewname”)
    * Success

    EXPECT ONE OF:
    – Uppercase characters are rejected in HTML form
    – Uppercase characters are automatically updated ToLowercase() in HTML form
    – Uppercase characters are silently updated ToLowercase() before calling backend API

  • Unknown's avatar
    staartmees · Member · Aug 7, 2026 at 6:33 am
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    That’s not a bug, those are the rules of our platform.

    Username Rules

    • Must use lowercase letters (a-z) only.
    • Can contain numbers (0-9).
    • Cannot include uppercase letters.
    • Cannot have spaces.

    Alternatives

    • Set a Display Name on your profile if you want capitalized words shown publicly.
  • Unknown's avatar
    feyandfortune · Member · Aug 7, 2026 at 7:25 am
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    Right, the bug isn’t in the username rules. It’s that the validation in the HTML form doesn’t follow those rules when it comes to capital letters – it appears to validate correctly, then fails with generic error msg when submitting.

    In the input form:
    * this<space>name => “Usernames can only contain lowercase letters (a-z) and numbers.”
    * this&that => “Usernames can only contain lowercase letters (a-z) and numbers.”
    * “ThisIsACoolLongNewName” => “Nice username!”

    EXPECT ONE OF:
    – Uppercase characters are rejected in HTML form (“Usernames can only contain lowercase letters (a-z) and numbers.”)
    – Uppercase characters are automatically updated ToLowercase() in HTML form
    – Uppercase characters are silently updated ToLowercase() before calling backend API

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  • In: Support
  • 2 participants
  • 2 replies
  • Last activity 3 days
  • Latest reply from feyandfortune

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