Google's disavow tool is still a hot topic amongst SEOs and will be as long as Google is at war on links.
Marie Haynes asked Google's John Mueller a question on Twitter about the tool that I've never seen asked. Does the case of your words in the disavow file matter. If you use upper case or lower case, does it make a difference. For example, typing Domain:www.example.com vs domain:www.example.com - does that make a difference?
John Mueller from Google said both work fine and it doesn't make a difference.
Here is John's response:
@Marie_Haynes Yes, upper-case or lower-case for that directive is fine.
— John Mueller (@JohnMu) January 7, 2015
One less thing for SEOs to obsess over.
Forum discussion at Twitter.