No Focus on "Attach file" dialog if user press "esc" to dimiss to browse dialog in safari 4

Steps:
1. login to JIRA.
2. View any issue and through . dialog select the "Attach file".
3. Press spacebar to open the "browse" dialog. Now without selecting any file the user has press "esc" to dismiss it.

Result:
1. The focus is no where in the dialog.
2. The same scenario works in all other browsers, the focus is back on "Browse" button.