As I'm sure you're aware the current releases of the DLR are all messed up. For example. The current releases of ironruby, ironpython and silverlight all use the DLR (microsoft.scripting). However, all of them have different version in their current releases. It appears that microsoft is slowly reworking the DLR and each project has a different one in use as they move methods from the the core assembly in to the main library. However it is incomplete with each one in various stages.
even ironruby and ironpython change dramaticly between releases and break things. So until they finish refactoring their projects It seems safer to just stay with the releases your using.
So, is it possible for you to upload the version of these projects your using to the source tree. I have tested each one and they all break MSS. I'm not sure if your using the source but at minimum can you point me to the right releases that your coding against so I can download the source.