I just tried installing it on a clean 7.0.4 and it crashes the site. The log shows:

2014-03-12 14:20:26,658 [13] ERROR Umbraco.Core.UmbracoApplicationBase - [Thread 5] An unhandled exception occurred
System.FieldAccessException: Attempt by method 'Umbraco.Extensions.EventHandlers.RegisterEvents.ApplicationStarted(Umbraco.Core.UmbracoApplicationBase, Umbraco.Core.ApplicationContext)' to access field 'Umbraco.Web.UI.JavaScript.ServerVariablesParser.Parsing' failed.
   at Umbraco.Extensions.EventHandlers.RegisterEvents.ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
   at Umbraco.Core.ApplicationEventHandler.OnApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
   at Umbraco.Core.CoreBootManager.<Complete>b__5(IApplicationEventHandler x)
   at Umbraco.Core.EnumerableExtensions.ForEach[TItem](IEnumerable`1 items, Action`1 action)
   at Umbraco.Core.CoreBootManager.Complete(Action`1 afterComplete)
   at Umbraco.Web.WebBootManager.Complete(Action`1 afterComplete)
   at Umbraco.Core.UmbracoApplicationBase.StartApplication(Object sender, EventArgs e)
   at Umbraco.Core.UmbracoApplicationBase.Application_Start(Object sender, EventArgs e)