A variety of issues in this example:

• When focus is on a tab1 checkbox, and ctrl+tab is pressed, focus jumps away from the tab-panel. This occurs whether or not type='content'
• When focus is on "Tab1" and Ctrl+Tab is pressed, JAWS announces "Tab2 tab Tab2 tab", repeating itself. Unaffected by type='content'
• With type='content', and focus is on the Sunday checkbox, JAWS reads content after the checkbox instead of the checkbox label.
• With type='content' and forms mode is off, JAWS has unpredictable behavior when focus is on Tab1 and ctrl+tab is pressed multiple times. When forms mode is on or type='content' is not specified, it appears to be okay.
• With type='content', enter both toggles a checkbox and toggles forms mode. Spacebar toggles a checkbox but does not affect forms mode. When type='content' is not specified only spacebar toggles a checkbox and does not affect forms mode.