Last modified: 2012-04-16 09:15:36 UTC
When unblocking a user, the User text field is automatically filled with the user's name. However, for whitespace the field uses underscores. This causes an "Block ID not found. It may have been unblocked already" error when attempting to unblock. Replacing the underscores with whitespace fixes the problem. See also: http://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)#Error_trying_to_lift_a_block
Is this a 1.17 regression ?
Fixed in r83798. If this is a regression, that needs to be backported (probably safest to do it anyway).