Inverse selection hotkey does not work for search result sets

Using build 1332. At one point in time, I recall being able to do a search, use the 'select marked' hotkey and then inverse the selection with the "CTRL + I" hotkey on the results. However, in the last few builds I have downloaded, the functionality has diminished.

To manually inverse the selection in the when dealing with many thousands of files in the result set takes a very long time. I'm pretty sure this is a bug. I see no reason why this hotkey will work in the local and remote pane but not in the search result window as the 'select marked' hotkey works there.