Today I noticed that I can not select the post-type "page" from the dropdown in the Widget options.
When I mouse over the list the dropdown will close without being able to choose. The option "post" works, probably since its the default.
I uninstalled/reinstalled the plugin, disabled all possible plugins, but that did not help.
Also was able to reproduce the behavior in another 3.5 test install. I double checked a website with 3.4.2 with practically the same plugins and template and there everything is normal.
So it look like its related to the 3.5 WordPress version.
Any ideas ? And can someone maybe confirm the behavior in another setup?