I want to use Aptana Studio 3 for developing jquery-mobile projects. Since jquery-mobile uses HTML5 I have to use tag attributes like \"data-role=\"header\" whi
\"data-role=\"header\"
It more of a missing feature than a bug.
In Preferences > Aptana Studio > Validation you can define regular expression that match to errors/warnings you want to be ignored.
.*data-role.* should do it.
.*data-role.*