Yeah, it happens, for some reason pretty much only with Ubuntu users in my experience. Maybe because they are in a huge majority. If I get a bug report for an older version, I'll thank the reporter for the effort they took and point them to the kubuntu beta ppa, which always contains the latest version we've released. End of "problem".
I know it's attractive to see problems everywhere and argue that the status quo is broken and needs to be replaced, but for me as an application developer the current model really works a lot better for me than what I have to do on Windows. Especially if you try to push your application through one of the app stores on Windows.