Pics would be helpful, but I think I know what you're talking about. The question is, are they horizontal or vertical, if they're horizontal then you should be fine because it's just the topsheet coating bending to the flex of the ski, if they're vertical, you might run into some problems with delam because if they get pulled up they'll delam much easier because of the cracks. If they're spiderwebby, you're most likely also fine too.
If you can get some pics I might be able to tell you more. Also, if it is really bothering/worrying you, you can email Liberty and show them and see what they say.