Ok, I was finally able to resolve it with some "voodoo". (The file file is quite
small - about 2 mb, it's a windows DLL) First I pulled into some other repo (on
yet another local machine) and then was able to pull into my original target
from that intermediate one. I don't know why it worked this way. I checked
everything with "hg verify" and no problems were reported. After that
"operation" everything works fine.

Anyway, thanks for the info.

Regards,
Vlad