The battles between the creationists and the evolutionists rages on...  but there are some major problems I find on the side of creationist arguments.  These problems don't prove the creation theory wrong, but they cause major problems when trying to debate the evolutionist.  (The evolutionists have their own problems as well, but I'm dealing with creationists here.) 

To start, I am tired of seeing basking shark carcasses on creationist websites claiming them to be plesiosaurs.  I have studied cryptozoology for far longer than I've been a 6-day creationist, and I can say that basking sharks DO decay into a plesiosaur-like form.  This is not to say that some strange carcasses could not be plesiosaurs.  But there are too many well documented basking shark carcass photos showing up on creationist and "dinos alive today" websites.  There are some photos that may infact show some validity to living dinosaurs and water reptiles, but no more basking sharks please!

Another problem when presenting an argument to atheists is quoting the Bible incessantly.  (Bet you'd never thought you'd hear me say that did you?)  The problem with quoting the Bible in a creation v. evolution debate is that an atheist isn't going to accept that as any sort of proof, and you only further hinder your own cause by doing so.  Besides that, they already know good and well that you believe the Bible.  If you're going to witness the Gospel to them, yes, quote the Bible.  But if you're going to prove creation with science, use science to support recent creation, or attack the evolutionist methods of science. 

Another problem I find is that some creationists are too argumentative.  I understand it's an emotional issue for many people on both sides, and even I myself am guilty of getting over-emotional, but we all have to remember that we're debating something based on fact, if we let all our emotions bleed in we lose something in that argument.  Be passionate, but don't be a freak.

Another problem would be that too few creationists actually understand evolutionist claims... although there is some variation amongst scientists.  Too few tend to grasp the basic concepts of the science techniques evolutionists use to back themselves up.  You don't have to be an evolution expert, but to have a basic grasp of it would be a good idea.  You should discuss it if you are unaware, but I don't recommend you go jump into a debate with a college proffessor because you read a website.  Do some reading!  Evolution has many of its own "heretics," and oftentimes creationists will confuse the "heresy" of evolution with what the theory actually teaches. (I think one evolution "heresy" would be "ontology recapitulates phylogeny" thankyou Whispertales).

Yeah... there are probably some more...  But those are some problems that many creationists need to address.  I support creationism, but I don't support ignorance... Even though many evolutionist claim by believing in recent creation I am myself ignorant, but whatever... that starts something completely different than what I was addressing.