Mesh Select Random Percent changes selection mode.

Support Basics & Interface
1

When i select mesh faces (or edges) and try to change Random Percent value for that selection on T-panel, selection mode is changed to Vertices. I expect selection mode still be Faces or Edges.
Could this be a bug?

v.2.63.2.

2

It seems that win32 builds are affected. blender-2.63-r46680-win32.zip from builder.blender.org - changes selection mode.