Hi,
Try suggesting they delete all cookies they currently have in Safari / Preferences - Security - Show Cookies.
Instead of Always accept cookies, better to use: Only from sites I visit.
Quit Safari (Command + Q) then relaunch Safari.
If that didn't help, open a Finder window. Select the user account in the Sidebar on the left, then open the Cookies folder. Move the
Cookies.plist file from the Cookies folder to the Trash.
Relaunch Safari.
Sometimes troubleshooting the Safari .plist file can help.
Open a Finder window. Select your Home Folder in the Sidebar on the left. It has a small house icon. Then open the Library folder then the Preferences folder. Move the
com.apple.Safari.plist file from the Preferences folder to the Desktop. Relaunch Safari, see if made a difference.
Also, some Safari users may have Extensions installed in Safari / Preferences - Extensions that prevent them from submitting an application.
And in Safari / Preferences - Autofill. Click the Edit button next to: Other forms
Delete the the State of Alaska website url, click Done.
Safari third party unsupported add-ons can also be a factor. Troubleshooting help here.
http://support.apple.com/kb/TS3230?viewlocale=en_US
Carolyn 🙂