Created attachment 98094 [details]
Screenshot of behavior. Left 126.96.36.199, right 188.8.131.52 alpha1
Tested using Windows 8.1 with LibreOffice Version: 184.108.40.206.alpha1+
Build ID: 145f2e970f46a3a3e5456b122d71f17c3abe878f
TinderBox: Win-x86@42, Branch:master, Time: 2014-04-26_23:32:36
* Open Impress
* Make sure Sidebar is visible (View > Sidebar)
* Go to 'Master Pages' (second Icon for me)
Behavior: looks like there are no master slides available, but they are just invisible. If you click around, you can apply the master slide correctly.
See attached screenshot
Joren: I think https://bugs.freedesktop.org/show_bug.cgi?id=77874#c6 applies here too.
So put it as FIXED. Don't hesitate to reopen this tracker if I'm wrong.