Hi,
Like most, I typically download the CSIDE zip, unzip it, and drop the jar in my dropins directory. Today I tried to do it as is now recommended, which is to use Eclipses Install New Software. I dutifully downloaded the latest plugin (after removing the old one), then I went through the steps as outlined in the IDE Install guide. When I add my archive I get the following error:

I tried both with the .zip and with the unzipped jar file. Neither is recognized by Eclipse. Is there some as of yet undocumented thing I need to do? I'm running Eclipse as Administrator.
I'm going through this process just in case installing this way might correct some of the strange behaviour with build clean always hanging (that will be another post).
-Hugh