When submitting these, browser throws warning:

• Assign assue popup
• Clicking on the search result of the quick search

Firefox:

Are you sure you want to navigate away from this page?

You have entered new data on this page. If you navigate away from this page without first saving your data, the changes will be lost.

Press OK to continue, or Cancel to stay on the current page.

Chrome:

You have entered new data on this page. If you navigate away from this page without first saving your data, the changes will be lost.

This can be annoying especially when it involves frequent assigns. Also, all browser tabs will freeze until the warning is dismissed.

Note: This problem does not exist in standalone JIRA 4.2.2.

Workaround: Use the mouse middle-click button to force browser to open a new tab displaying the action results page.