Given the following directory structure in the repository:

dir1/test/
dir1/test/main.c
dir1/testlink -> test
dir2

If you wanted to move test and testlink out of dir1 and into dir2, you might do
something like this:

mv dir1/test dir2
mv dir1/testlink dir2
hg copy -A dir1/test/main.c dir2/test/main.c
hg copy -A dir1/testlink dir2/testlink

What is happening though, is the last command will trigger the following error:

abort: path 'dir2/testlink/testlink' traverses symbolic link 'dir2/testlink'

This is despite you never referencing a 'dir2/testlink/testlink'.  Seems like
this is something that should work.  FYI, I tickled this bug when using
hgimportsvn/hgpullsvn.