Although I report this for 1.0.10, it's not a 1.0.10 specific issue as I've seen in in previous versions:
For some objects the input and/or output labels are missing. I've seen this in factory objects and my own objects. Trying to change the names doesn't help. At one point when using 1.0.9, I discussed this with a mate, and did some refreshing, and suddenly the label appeared - I can't remember exactly what I did or which object it was, but it wasn't a real change to anything structural or syntactical IIRC. There may be some intentional mechanism at play that I'm not aware of, but I'd like those labels to show.
Examples:
axoloti-factory/objects/lfo/square => "out" label missing
axoloti-contrib/objects/drj/osc/phasor_pm_pr_b => "out" label missing
Axoloti version : 1.0.10-0-gf8ed51d-dirty build time : 10/05/2016 20:18:33 CEST, Link to firmware CRC 3DB31696
Platform: Win 7 64 bit