Yes, unfortunately with all the things Linux gets right, there's always those tiny but annoying bugs. Windows and OSX have fewer because they have huge budgets and strong management to make sure things are polished.
On the other hand, I've encountered issues on OSX that I simply couldn't fix. With Linux, if you care enough about a bug you can generally find some workaround. (Assuming it's not driver related!)
Fair - but too often the bugs are driver-related. I realize that this is kind of unavoidable for open-source software in our economic system, but it doesn't make it any less annoying.
It was the driver bugs that drove me back to Windows - doing multi-monitor is a pain in the rear, and suspend/hibernate would often break on distro update in the rare cases they worked before. Getting an up-to-date Web browser is a big plus for Windows over most Linux distros too (I know about Debian testing, Arch, PPA's, etc. - I said "most").
They stay well up to date, but not because of Ubuntu. At least the last time I used Chrome, it required a PPA from Google, which is updated by Google. The Firefox repo is updated by Canonical's apt staff.
Service host (was that the correct name?) crashes at least once a week. Service host suddenly takes 90%+ of cpu. Start bar hiding behind windows. Sleep randomly causes hibernate or reboot instead. Network doesn't work properly after resuming the system (take cable out, plug in again - works). System update hangs forever. Copy anything formatted + paste into outlook -> rarely causes whole machine to freeze for ~2min. Wifi direct popup shows up again after closing. Changing location of a network printer (same printer, just moved) requires downloading its drivers again (ubuntu has them by default). Bluetooth just doesn't connect with Galaxy S2 (no problems under ubuntu). I could go on...
And that's a proper laptop with a clean system, part of an AD, running only outlook the whole day.
On the other hand ubuntu natty used at the same time as the main machine, usually handling heavy development, testing and a number of VMs didn't surprise me once.
Interesting. I don't see any of those issues on all four Windows machines I use daily(Work PC, home desktop, laptop, HTPC). There might be something with your setup, network or hardware causing this.