I have installed clean YAF-v1.9.4-FINAL-SRC, and am having issues. Installation went fine, but roles threw an error on initial install. I turned this to false(to disable roles temporarily to get it installed) and the rest went fine, Re-enabled, and was able to create the admin user. Now all I get is "There is no row at position 0." Sure seems like a common error here... Anyways, the call stack looks like this:

[IndexOutOfRangeException: There is no row at position 0.]
System.Data.RBTree`1.GetNodeByIndex(Int32 userIndex) +1553670
System.Data.RBTree`1.get_Item(Int32 index) +19
System.Data.DataRowCollection.get_Item(Int32 index) +11
YAF.Classes.Core.ThemeHandler.InitTheme() +350
YAF.Classes.Core.ThemeHandler.get_Theme() +16
YAF.Classes.Core.YafContext.get_Theme() +29
YAF.Forum.GetPageSource() +294
YAF.Forum.Forum_Load(Object sender, EventArgs e) +84
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627