Today I received my new izula in od green, as well as my wifes izula in pink. We are both very pleased with the knives and I think it's going to compliment my 3 and 5 very well. For some reason, the sheath keeps marking the knife where the retention knubs make contact with the blade, not all that noticeable on mine, but very noticeable on my wifes. So my questions are, is this common among the izula sheaths? Will it eventually stop? If not, what is a quick and inexpensive fix that you know of? Thanks guys