I can confirm this bug. I have updated the bug report with more precise information, and I'm adding additional screenshots to demonstrate the issue.
Additionally, I've noted that:
* There is no difference between --include-border and --remove-border: the window border is included in the screenshot in any case. It may be an unrelated bug though.
* The documentation (man and --help) doesn't state which of --include-border or --remove-border is the default.
I can confirm this bug. I have updated the bug report with more precise information, and I'm adding additional screenshots to demonstrate the issue.
Additionally, I've noted that:
* There is no difference between --include-border and --remove-border: the window border is included in the screenshot in any case. It may be an unrelated bug though.
* The documentation (man and --help) doesn't state which of --include-border or --remove-border is the default.