Our JRE image has two copies of msvcr100.dll. To save on download size, we ignore this file during the building of the RtPatch binary diff file. We also duplicate the file during install. The deploy group has been moving/renaming directories a lot lately. When the directory has msvcr100.dll in it, it is causing problems (because it is ignored by rtpatch).
We are only saving 313KB (compressed) for each copy of msvcr100.dll that we duplicate during install runtime. However, it is more robust and easier to maintain if we just take the 313KB hit on the download size and just treat this file like any other. There is a good chance that the deploy group may move directories with msvcr100.dll in the future.