There's been an on-going problem with CCleaner correctly cleaning the recycle bin on a dual disk system, first entered back in November. Any folder in the recycle bin for either drive causes the problem where the recycle bin's files and the related info2 file are not correctly reset (actually, the info2 file is reset to it's empty state but the file representing the deleted folder is still there).
I re-entered this since the problem is still occuring in the latest release - 315.1643. I don't remember now which version the error began in (that was in one of the entries of the original post) but it was 4 or 5 releases ago.
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Interestingly, if I delete a folder, running CCleaner shows that it's going to clean the recycle bin in the analyze scan, but after cleaning it does not show the recycle bin in the list of cleaned selections. At that point, the recycle bin icon still shows that there's something in it, opening the recycle bin shows there's nothing there, but clicking on the Empty link (which is not greyed out) asks if you want to delete "Windows" - which is a known problem from as far back as W98 if the recycle bin structure or contents are hosed. Luckily, ignoring the possibility that "Windows" will be deleted, clicking the 'Empty' link resets the recycle bin to it's normal empty state.