Answer:
Depends on which version of the bible you mean.
Most modern English Christian bibles are based off the Catholic translations, which were manipulated to support the Catholic hierarchy and the personal beliefs of those in power.
Anyone who considers themselves an avid Christian should learn Aramaic(the language the bible was originally written in) (or Greek, even) and read the original (i.e. most accurate) versions of the bible to gain a better understanding of their god.
If you take it upon yourself to actually understand what you're claiming you believe, you'll be surprised by what you could learn.
As far as Catholic contradictions within the Aramaic bible, I'm not sure of all of them considering I'm not Catholic.
Although a few obvious ones would be the rapture, the whole dietary restriction on Friday thing, the 'deny me in front of your friends and I'll deny you in front of my father' line is nowhere to be found in the Aramaic bible, mention of hell for not believing in Jesus is not found, priests being celibate goes against god's order to multipl as per genesis. I'm sure there are many more.