Title pretty much says it, I have an S3 I9300 that is occasionally freezing for about 10~ minutes at a time. I looked at a few threads that mentioned that it might be bad memory blocks, but I don't think that's it since this only started happening since I flashed Omnirom (omni-4.4.2-20140518-i9300-NIGHTLY), I was previously using CM 10.2 and had no (freezing related) trouble with that. I can't reproduce the problem in any specific way, it seems to be random, usually after you try to make an action of some sort.
Is this a known issue? Would re-flashing it be likely to help? It's unlikely to be an app interfering, as this was happening before I even in stalled GApps