I've just completely over-hauled my Adwords using Adwords Editor but when I upload the updates it says: "Changes that you have made that will not be posted", then lists all my changes. All the recent changes are highlighted in purple. Does it take a day (or whatever) to become active in my live Google Adwords? Am I being impatient? (hopefully this all makes sense )
Changes that are uploaded take affect immediately. Most likely the changes you made in editor do not comply - to start checking, go under ads tab then look for the length of headline/desc1/desc2. It should show right there the issue.
They will take effect immediately but content network changes will take effect only once they are approved by an adwords specialist.
That message is appearing in Editor yes? It means you haven't done something correctly in Editor (it can be a bit fiddly sometimes) go back through your changes and make sure they're all correct - without seeing all your changes I can't be any more specific than that