Earlier today I posted a blog entry that I titled (GarbageCollection==FromFile==Evil) || (Streams==Good). I was using Windows LiveWriter to write the blog entry and it posted fine. When I went to view the entry, however, I got the following error:

[ArgumentException: Illegal characters in path.]
   System.Web.Configuration.MetabaseServerConfig.MapPathCaching(String siteID, VirtualPath path) +3591442
   System.Web.Configuration.MetabaseServerConfig.System.Web.Configuration.IConfigMapPath2.MapPath(String siteID, VirtualPath vpath) +9
   System.Web.Hosting.HostingEnvironment.MapPathActual(VirtualPath virtualPath, Boolean permitNull) +169
   System.Web.CachedPathData.GetConfigPathData(String configPath) +389
   System.Web.CachedPathData.GetVirtualPathData(VirtualPath virtualPath, Boolean permitPathsOutsideApp) +132   System.Web.HttpContext.GetFilePathData() +27
   System.Web.HttpContext.GetConfigurationPathData() +26
   System.Web.Configuration.HttpCapabilitiesBase.GetBrowserCapabilities(HttpRequest request) +133   System.Web.HttpRequest.get_Browser() +197
   System.Web.Errorformatter.RequiresAdaptiveErrorReporting(HttpContext context) +102

Turns out that the || were the problem, since changing them to vs took care of the problem. Shouldn't the Title parser have removed the pipes the same way it did the parentheses?