Conflict with TextExpander

I installed Quicksilver about six months ago after someone I met at a
meeting said that it was wonderful. However, although I was initially
impressed I've hardly used it at all in practice, because it doesn't
seem to work well with TextExpander, which I use all the time and
couldn't live without. Yet other people seem to use both without
problems. Specifically, every time TextExpander expands anything the
first item in the Quicksilver clipboard history gets duplicated and
all the other entries get shifted down the list. As a result the
Clipboard history is much less useful than it ought to be, because it
typically shows a list of ten identical items. Do others get this? Or
is there a way to stop this behaviour?

As a test case, I've just done command-C on the word Quicksilver, and
it appears as item 1 in the list. However, I've just expanded two
abbreviations -- one for "the" and tanother for "However" -- so now
entries 0 to 4 all read "Quicksilver".