I never had an italian version with
http://www.bookandnegative.com/it/page/2/
honestly i don't know if it is an old sitemap error?
I don't know where the error is generated and when, or the error is generated by a cron?
For the first error what do you think?
About the upgrade, i do everitime the db backup, but if is it possible could you add a procedure to do a selective backup and a selective revert?
I see all the code have the comment, but with a clear guide will be more simpler, anyway everyone have to study a little bit the code of the plugin in order to find the database table and location.
For example my site have a bigger database and a complete restore for a single plugin i think is excessive.
I'll do the update from 1.0.4 to 1.3.1, like every plugin update i'll disable all plugin and back to the default theme and i'll take fingers crossed XD
like Arnold Swartzenegger said "I'll be back" XD
Thanks for your reply ;)