i don't know if this will help.
"Lavanya 2011-11-18 14:33:16 EET
Thanks for your input. This is now fixed in the internal releases and will be
available in the future updates for N9. However as a workaround you could do
Settings -> Reset -> clear device and re-configure all your accounts.

Note:
This will clear all your data on the device. Backup and restore is not an
option as it would get back the old settings and problem persists."