Posting in the Magento forums has been disabled pending the implementation of a new and improved forum solution which should better serve the community.
For new questions please post at magento.stackexchange.com, the community-run support site for the Magento community. We will be providing updates on the new forum solution soon. For questions or concerns please email firstname.lastname@example.org.
Provided your server is properly configured, you should be able to upgrade without much hassle by using the Magento Connect Manager. Make sure to select the Mage_All_Latest meta package. Most of the problems people are experiencing are due to incorrect file permissions on shared hosting.