Referring to this discussion, now closed, the problem happened to me again today after recording a stock sale with a capital gain. [See update below]
Eight of my tax planner settings changed from Scheduled Bills and Deposits to Estimate based on YTD Daily Average or No Projected Amount.
I am running R67.7 and my data file is on my C drive. I had been running R67.7 for several days before the settings changed, so the problem was not caused by the software update.
I sure wish Quicken would fix this longstanding issue.