Releases In the Trash!?

Running Nexus version 1.3.3.  I noticed yesterday that, in my companies Nexus install, all our old releases were missing.  It turns out that on Saturday, May 30th, they were put in the trash folder. 

I have several scheduled tasks, but I did not understand any of them to ever delete released jars. 

1) What all do I have to do to get those releases back from the trash into the releases?
2) What should I look for in terms of things that could have caused this?  What log files should I look at?

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Stephen Duncan Jr
www.stephenduncanjr.com