Using Trello and had a Description on a card within a board. I tried to save the updates I had made to the Description, and received an error about HTML (sorry - didn't capture exact message).
I copy/pasted my edits into a comment, and posted it. The comment was present on the card. Shortly after, my internet connection was lost. When I regained connection, neither the edits made to the Description, or the comment I had posted, were present.
Just lost a lot of notes in the process... any way to get them back, or am I out of luck?