Hey all, my apologies if this is a known issue (I couldn't find a "Known Issues" page anywhere, and the Github repository appears to be private), but I think I've found a bug in O3X 1.2.0 on OS X 10.9.2. If you create a hard link to a file using the ln tool, both files will show up correctly in the output of the ls tool, but in the Finder, only the original file will display correctly, whereas the hard link will either a) not display at all, b) display but with the filename of the original file instead of the hard link's filename, or c) briefly flicker into existence before disappearing again.
This can be seen by running these three commands when cd'ed into a directory on a ZFS volume:
echo "Foo" > Foo
ln Foo Bar
open .
Again, my apologies if this is known and I'm just clogging up the pipeline.