So...I have passed my viva, subject to minor corrections. Some of these were very unambiguous, such as typos, but one request has been a bit more vague, and subject to my own judgement where to modify it throughout the thesis. I had a meeting with my internal, and we discussed the amends, but I still felt there was an ambiguity about the scope of what was to be corrected. I emailed a list of the corrections I thought we agreed but haven't heard back from the internal. I made what I thought were the correct correctiions and emailed the revised thesis over, but am now wondering whether I need to make further amends. I guess it's not etiquette to send another corrected version of the thesis over?(even though I am still within the cut-off time to send this to my internal).

No, don't send any further corrections - this will make them question whether the corrections you have made are sufficient. In my experience, they don't pay too much attention to minors anyway, so I'm sure you will be fine.

Just leave it now, you probably won't hear anything til after Christmas. Forget about it until January.

I agree with TreeofLife, wait to hear back from them in January.

I agree you should leave it for now. If you sent the internal a list of the agreed corrections as you understood them, and they didn't reply with any changes or comments, then it's reasonable to assume they had no objections.