Here is what I know of parse error and this is just based on my own guesses.
Parse errors are timeouts in loading certain assets (by assets I mean, screenshots on angles, or other animations, like reverse views, etc). The game data is on many servers worldwide, so sometimes your connection to those servers maybe unstable. In other way, say you go to google.com, you typed address and click enter and usually takes 2 seconds and today took 8 seconds to load it. Well, that's similar to parse error, cause it took a while to load it, just you see it differently.
Now, some country's still filter all incoming traffic, such as South Africa, so when something happens, in the USA few random players are affected by it, but in SA case, most of the country is.
Now, those are just guesses on my end, but i'd call them educated guesses. I could be off or wrong though.
-wgticon