reorderlist not working with 40412/VS2010

using 40412 in VS2010, I can't get reorderlist to work - can't pick any items up and move them around in any browser. sample site works fine, and I even tried referencing the dll from the bin directory there with no luck. tried running some code that binds data manually from a working project that uses a previous release and all I get is a regular list. converted data source to a sqldatasource and still no dice. 

one oddity I do see between my non-working project and the other working examples (sample site and my older project) is that the generated list item div IDs are identical in my project, while the working examples all have unique IDs generated, ie:

non-working project: <li id="ReorderList1" style="vertical-align:middle;"> (all LIs identical)
working example (40412 sample site): ><li id="ctl00_SampleContent_ReorderList1__rli5" style="vertical-align:middle;"> (each line has unique suffix - in this case __rli5)

thanks for the help