Hallo,
I've got N97 mini. Last week I downloaded and installed all the optional updates found via Software updater application. When I restarted the device (with my widgets shown) for the updates to take effect, after booting the device restarted automatically again(once). When I tried to restart the device with the hidden widgets, booting finished successfully. It does not happen everytime.
After uninstallation of all the optional updates my device works fine again.
Please, can you have a look at this issue? 
Thank you.