I'm using the DataTypeService to get the "nice text" (GetPreValueAsString) for a selected dropdownlist item. But on the first load of the website, I receive the following YSOD:

[InvalidOperationException: Sequence contains no matching element] System.Linq.Enumerable.Single(IEnumerable`1 source, Func`2 predicate) +621 Umbraco.Core.Persistence.Repositories.DataTypeDefinitionRepository.GetPreValueAsString(Int32 preValueId) +300 Umbraco.Core.Services.DataTypeService.GetPreValueAsString(Int32 id) +105

It looks as if something is not completely initialized when the call to the DataTypeService is invoked, because I only receive this message on the first run (after building). When I access the Umbraco backend in another page and then switch back to the actual page, the page loads just fine.

I should perhaps not that I'm using Zbu's ModelBuilder to generate strongtyped models for my document types (which works just fine).