Fix for nsbeta2+ bug #45653. Removed code that appends a '/' since the call to Append is taking care of that for us. This was resulting in a double slash at the end of the mURL string and the Mac gagged on it.

xpinstall/src/nsRegisterItem.cpp

@@ -90,8 +90,6 @@ PRInt32 nsRegisterItem::Prepare()
 
         if (!isDir)
             mURL.Append("!/");
-        else
-            mURL.Append("/");
     }
 
     return nsInstall::SUCCESS;