Oh, that's exactly what I want to hear: everyone has gaps in their knowledge and it takes guts to admit it. As long as you can see that, and know where to gain the knowledge, than that won't be a problem.

Unless that knowledge is something vital and general. I.e. like not knowing what HTML is.

In the future I want to use internships to find younger engineers - it lets you get to know people a bit, and keeps new ideas flowing through the company.