One thing that seems to becoming increasingly common (on my machine) is that opening extensions a second time to configure instances (DataAssist, CssFormBuilder) each time adds a duplicate of pretty much all the code it originally created.
DataAssist adds new duplicate recordsets each time I open a recordset from the bindings panel and make achange, rather than rewriting the existing code. This is in CS4, which I've always used . . . . weird.