Checked issue on: 1. old ff versions 2. ie all latest versions 3. opera 4. safari 5. and even faked user agent on the ff 5.0 browser In 1-4 above issue could not be reproduced. On point 5 above and ff 5.0 the issue is persistent! Issue: go to www.morsaml.org click on the english flag - it will take you to /uk_english site version. Now try clicking on the (site default) Norwegian flag... it will take you back again to the uk_english as it refuses to accept the new cookies sent and holds to some strange new function you must have for caching cookies (?!!!).