R help - Nov 2008 - odfWeave and XML... on a Mac

I'm trying out odfWeave in a Mac environment and getting some odd behavior.
Having figured out that the code snippets only work if they're in certain
fonts, I was able to get R to run a test document through and produce an
output document.  After running it, though, I get a warning message: 

Warning message:
In file.remove("styles_2.xml") :
  cannot remove file 'styles_2.xml', reason 'No such file or
directory'

This message is interesting given that about 20 lines earlier I see:
Renaming styles_2.xml to styles.xml

If I run the test doc in results=verbatim mode, I see that warning by my
results appear in the appropriate places on the output document:

*****output*****
This is the basic text stuff.  Now I will try to input the other stuff:

[1] 5

And this is the after-text. 
*****end*****

If I run the test document in results=xml mode, though, the output is blank:

*******output*****

This is the basic text stuff.  Now I will try to input the other stuff:


And this is the after-text.
******end*****

Earlier posts on this forum suggest that the solution may involve loading an
earlier build of XML.  Is that likely to work?  And if so - stupid question
I'm sure, but how do I do that?

Thanks in advance for the time and attention of people more experienced than
myself...


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In case anyone has a similar issue, this problem was related to how
the results were being sent to the file.

The offending code chunk used:

<<moretest, results=xml, echo=false>>x<- 5
x
@

which writes out the text "5" without any XML around it. When OO opens
the document up, it ignores this text (instead of crashing) and shows
nothing.

This works fine:

<<moretest2, results=xml, echo=false>>x<- 5
odfCat(x)
@