Hi, I was trying to write a small test for this issue, but I can't tell any 
difference.
Could you please modify the tests I've attached in order to reproduce this 
issue?

Thanks

When there is only one cset, merge and rebase should find the same result, 
it's not always the case:

hg init repo
cd repo
mkdir t
for i in a b c d e ;
do	echo $i > t/$i
done
hg ci -Am init
hg mv t tt
hg ci -m rename


hg up 0
echo f > t/f
hg add t/f    # new
echo g > t/g  # unknown
hg rm t/a     # removed
echo b >> t/b # modified
hg st -A
hg ci -m m
hg diff -c tip
hg up -C 1
#hg --debug merge
hg rebase -s 2 -d 1
hg diff -c tip
#hg --debug up
hg st -A

At the end, 'a' isn't removed in the renamed directory, merge does it 
correctly.