For the past couple of weeks now, we've been seeing this a lot. Happens several times each day. When configuring a smart campaign and moving between the smart list, flow, and schedule, Marketo will display a blank gray screen with "Saving Smart Campaign..." - and it just hangs there. The only way to get out of this is to click on a completely different smart campaign or asset on the left, and then return to the smart campaign. Anyone else experiencing this?