When using Microsoft.AspNet.Web.Optimization you get an annoying ?v=[hash] at the end of the bundle urls.
To get around this problem I created an extension for this available on Nuget and GitHub:
http://www.nuget.org/packages/Bundling.Extensions/
https://github.com/unger/Bundling.Extensions
Why is version revving in querystring a bad thing?
http://stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring