FYI I'm also having problems when trying to download the zip files from your site. Approx.a month ago I had no problem but now I get a corrupted file, both with raindetails and sparkline. I've tried Windows server 2003, 2008 and Vista 32 and 64 with the same result. Also tried the build in program, and winzip. When downloading the file from this thread it works fine.
Think I might have found the problem to this. It appears to be related to zlib compression used by the web server that for some reason was attempting to compress the already compressed zip file. The config was supposed to prevent that, but I think it might not have been working correctly.
Anyone that has had this issue in the past, might give it a try off the download page now to see if the changes I made to the webserver made a difference. On another forum, it seems to have cleared up this issue.
I was never able to duplicate the issue myself, but have gotten a number of reports where people had the problem.
Two script download areas that might have been effected:
WD Scripts download page Cumulus Scripts download page