Wikimedia Commons has an image upload Wizard.
In the part of the wizard which requests a user to name the license for a file which is not their own, "Creative Commons license" is an option.
There are radio buttons in that option to choose CC-By and CC-By-SA 2.5 and 3.0. I had a file which was CC-By-2.0, so I selected other option.
This gave me a box where I could put wikitext and preview it. I put in {{Cc-by-2.0}} and clicked preview, and it called the proper template. However, when I clicked save, it said something like "this seems to not contain valid wikitext" and would not let me proceed.
I had to lie and say that I had a different license, and when I was done with the wizard I correct my lie. There must be some problem in which the wizard is expecting certain answers in the text box and it did not like the way I presented my valid response. My response should have been accepted.
Version: master
Severity: normal