I saw your post... though I don't think I have an answer, I did have questions?

Just wanted to confirm:

Post mentioned there was nothing in the bootstrap logs? (I'm curious there are none?)

Also when wanted to know ... when runing select@@version, I'm assuming it shows "upgraded" to SP4 patch num even though you mentioned some sprocs as part of the upgrade were not updated on the server?

Are the SQLSRVR.EXE excutables the same size by the way? (before and after on a current successfully patched version?..such as your successfully patched stand-alone server) May want to check this to 100% confirm patch successful on cluster?