I am running the latest version (6.1.7 Build 11609). Here's how the bug manifests itself:

1. Select two albums that have different "Date Added" values.

2. Open "Properties" dialog box.

3. The "Date Added" field, instead of showing "(various)," shows "12/31/1969."

4. Making any changes and clicking on "OK" leads to a crash and shuts the program down.