JMJimmy: I specified not to launch on startup, it ignored my choice. I specified to close on X instead of minimize, it ignored my choice. It began auto-updating without permission or way to cancel the download on a highly restricted data cap connection. I uninstalled.
I haven't experienced any of that outright. I did experience some problems with my preferences getting overwritten on updates of the client such as it blindly changing the installation and download directories I had previously configured, and ignoring my updates choices and turning updates on once though. That's the nature of incomplete beta software that is in deep development, there will be bugs and there will be features that do not work properly.
Nobody should use Galaxy without first accepting the fact that features will be buggy, options may or may not work (or may not even exist), and that the software will contain flaws and may not work properly. It's not a stable finished product yet.
Once it is completed and released as "stable" if these things happen, then that would be rather worrisome. For now though it is by definition what "beta software" means, and you're certainly right to uninstall it for now if that does not serve your purpose or expectations. I've uninstalled it myself several times over usability problems or similar that were not workable, waited a few weeks or longer, got the new version and tried again until I got something I could manage to use to some degree and properly test. It still has many problems but it is usable to a degree with limitations and without big expectations for now.