Pothos with little holes in the leaves
This is an established pothos that I've had for about 2 years named Jacques. Overall he seems quite healthy but he's got about 5 leaves with these strange little holes in them. The holes run in a straight line and don't seem to bother the leaf. I can't see any pests on him. The photo I uploaded, FYI, is a brand new leaf about 2 weeks old. He lives in a hanging pot and doesn't get great light. Any ideas? I just want to be sure it's not some pest that's bothering him. I know it could be a symptom of light or water, but it's on so few leaves...Thanks! :)
PS, sorry for the low quality of the picture. Cell phone doesn't have a very good camera!