On this page:

http://our.umbraco.org/wiki/how-tos/fix-odd-publishing-problems

It lists a query to run to see if there are "bad characters" in the content:

select distinct contentNodeId, path, text
from cmsPropertyData
inner join umbracoNode on umbracoNode.id = cmsPropertyData.contentNodeId
where dataNtext like '%%'     

I have over a thousand rows returned -- does this mean there's junk in my db that needs cleaning out? I am having issues with the media tree loading/backend office slowness. The log files have row after row of warning "Couldn't find any page with node id...." I'm using 6.0.3 (I believe), with Ublogsy.

Thanks! Steph