We are seeing low installation percentages with MS09-021 & MS09-027. Further investigation shows multiple 17031 errors on the clients when they try to install either Office2007-kb969613-etc. or Office2007-kb969679-etc. These issues are similar to what we saw occuring with MS09-017 last month, which was resolved with a new pmimport.
We have been able to isolate the issue and are working on a resolution. in this case the computers that the update is failing on are not vulnerable. The negative side affect is that it causes compliance numbers to be low when in fact vulnerable computers are patched. KB's 47815 and 47813 have been created for each update, please subscribe to them to get updates on the status.