I have installed Ubuntu 9.10 release in wubi and in normal mode on different hardware and every time I found out many annoying bugs and imperfections. E.g. wubi brakes without any messages; after normal (not wubi) installation gdm doesn’t “want” to load and I have to run it (sudo) manually through repair mode; there are many bugs in “Startup application references” and in “NetworkManager Applet”; Firefox “eats” CPU and memory resources, etc. I told about bugs but there are many strange “enhancements”, such as absence of popularity rating in Software Center and very inconvenient program description and installation (compare with Add/Remove applet in Ubuntu 9.04) The Karmic Koala (9.10) is very immature version in comparison with 9.04. I think that such half-done product discredits the idea of open source software because Ubuntu was most popular and pleasant (before 9.10) Linux distribution. What do you think, should Canonical revise their half-year release policy? In my opinion next Ubuntu versions should be released after comprehensive verification. Not obligatory in April and November.
Edit. I told about desktop edition, not server!