so just as an update, I just checked and it looks like the sudden conversion rate drop is across the board in Google Analytics for adwords, yahoo, all paid traffic as well. However "direct" conversion show an increase of 300% and a corresponding increase in tracked revenue. So this is clearly an analytics issue, but I'm wondering what could cause this as I didn't make any changes in the tracking code.
Hi, I'm seeing a similar problem but analytics is assigning all my traffic as organic (even though I know it's PPC). Looks like an issue with Google analytics, as I've not changed the tracking code either. Let me know if you find anything more!