WordPress MU

I am using the Advanced Permalinks plugin, but this is not (or perhaps it is) a support question for that plugin. I have a permalink structure which looks like this:

/blog/entries/%postname%
/blog/categories/%category%
and so on...

But my archival permalink looks like ww.com2009/08; do you notice what's wrong there? Stupid trailing slash... How might I fix this, be it through the plugin itself, or some mu options, or perhaps in the core code or db itself? I would like it to be as follows:

/blog/archives/%year%/%monthnum% and %day% where necessary.

I don't believe that plugin works with MU. (It may have been updated recently, but the last time I tried it, it did not work.)

It's working on a per blog setup, I haven't tried in the global plugins, but since it isn't made for that little folder your going to tell me to go somewhere else?