Dan Kaminsky did a review of the codebase in July 2011 and, contrary to his expectations, found it well written and found the potential security holes he had anticipated already well mitigated.

So if ppl are saying what you said ppl say in yr first paragraph then I'd say that they're fairly clueless. Kaminsky's review was well received at the time (and sparked further interest from serious developers in Bitcoin as a real & significant project).

Dan's review is still available onlne for those who want to read it (even though Dan has since passed away)