OK - what happens is 'Select All' selects both the track label AND the graph 'thumb'. After that, any function you use (change colors, change graph style, change an 'option') will lose the selection of the thumbs but not the selection of the track labels - this is generally not a problem and not really noticeable except that when you float, you lose the selection, since NOW there are no track labels to be selected... Select All still highlights the thumbs properly, but then after you do something to the floating graphs - label for instance - the selection is lost, since the 'thumbs' lose there 'selected' state. This is minor, I am sure, but I just want you to be aware of the issue.
If you feel like this is too minor, just set this to 'will not fix'.
Cannot reproduce. It probably got fixed in r13293-13295.