.hgcheck symlinks & dropbox

[Dr. Hegewald]

Hi all,
I share several development directories via dropbox. Most of them contain mercurial repositories. Everything went good so far. Now I got an error when doing hg up:
	abort: could not symlink to '.': File exists: foobar/.hgcheck/hg-checklink-hk9Io6
Mercurial seems to expext the file to be a symlink. It is a symlink on another machine, from which Dropbox "synced" it and copied the target instead of the symlink. Now it is a directory and hg fails with the above error.
So now I have these questions:
- can I namually remove the contents of .hgcheck ?
- is it a bad idea to sync mercurial repos via dropbox?
- what other symlinks are created by mercurial?

many TIA,
Jan