Reports are flooding in to Ubuntu's Installation & Upgrades forum from people having myriad problems with their upgrades. One user described it as a 'nightmare.' Users are producing detailed descriptions of problems but getting little help. This thread has mixed reports and is possibly the most interesting read. Many people report that straightforward upgrades of relatively mundane systems go well, but anything the least bit interesting seems not to have been accounted for, like software RAID, custom kernels, and Opera. Even the official upgrade method doesn't work for everyone, including crashes of the upgrade tool in the middle of installing, leaving systems unbootable, no longer recognizing devices (like the console keyboard!), reduced performance, X server crashes, wireless networking problems, the user password no longer working, numerous broken applications, and many even stranger things. Some of this is fairly subjective, with Kubuntu being a bit more problematic than Ubuntu, with reports that Xubuntu seems to have the worst problems, and remote upgrades are something you don't even want to try. Failed upgrades invariably require a complete reinstall. The conclusion from the street, about upgrading to Edgy, is a warning: If you're going to try to take the plunge, be sure to make a backup image of your boot partition before starting the upgrade. Your chances of having the upgrade be a total failure are high. If you're really dead-set on upgrading, you'll save yourself a lot of time and headache by backing up all of your personal files manually and doing a fresh install (don't forget to save your bookmarks!).