At times I return to past Brew Log entries in order to update them with additional information, correct spelling errors, etc. When I made a recent change to a brew log comment and saved/submitted the change, I noticed that I lost the gravity value on that entry (the cell was empty). I re-entered the gravity and resaved. Everything looked OK. I then did some testing. I started with a Brew Log entry with a gravity, temperature, and comment. If I changed the temperature entry or the comment and resaved, I would lose the existing gravity value. The program wasn't remembering what the value was. Conversely, if I changed the gravity value and resaved, the program retained all entries properly (gravity, temperature, and comment). Consequently, it looks like the problem is related to the program not retaining the gravity value if it isn't being changed/entered.