I received the following warnings while upgrading. Should I be worried?

warn: PHP magic_quotes_gpc [is enabled] You should consider disabling magic_quotes_gpc. For more information See What is magic_quotes_gpc and why should it be disabled? in the Zenphoto troubleshooting guide.

warn: PHP mbstring package [Your internal character set is ISO-8859-1] Setting mbstring.internal_encoding to UTF-8 in your php.ini file is recommended to insure accented and multi-byte characters function properly.

The first is explaind on hte troubleshooting and the second tells for what it is used. Otherwise use hte forum search we had this a lot before.