I have been using Beta Scriveners since last year.
I counted myself lucky not to have major issues.
I have upgraded to 049 on my desktop under windows 7, all is fine.
However, my laptop runs under Vista and was running beta 035 just fine, no problems.
I uninstalled 035 and did a clean install of Scrivener 046 and then a clean install of 049.
Now Scrivener does not work.
I open my project file and it loads as it should but from then on nothing works. Any action of mouse or otherwise causes Scrivener to freeze and go into a not responding state with the little circle going on for an extended time. When the little busy circle stops, any action causes it to return and Scrivener stops responding.
Even Task Manager will not come up to end Scrivener. I have to power off the laptop to get things going again.
My vista is up-to-date and I have had no problems with Scrivener until doing a clean install of 046 and after that, a clean install of 049. Both of them freeze on any action after loading the project file.
I went back to a clean install of 035. It works perfectly.
I was looking forward to buying the release version but now I am concerned about it.