Zip files unusable on Windows

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Download zip (eg iJab V1.0 beta3.zip)
2. Open using Windows Explorer (Vista 64-bit)
3. Try to extract all files

What is the expected output? What do you see instead?
expect top level files plus iJab folder with subfolders
instead get error messages about iJab already existing.  Using another
unzipper doesn't help, still it tries to create a 'file' called iJab as
well as the folder.  Problem might be all the strange named cache files?

What version of the product are you using? On what operating system?
V1.0 beta3 (tried beta2 too, no luck).  
Windows Vista 64-bit

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 15 Apr 2010 at 10:47