When pasting text that has been copied from an external application (e.g. Firefox), Using regular paste (Cmd-V): 1) An "Import Options" dialog is presented. If "Cancel" is selected, the text is pasted anyway 2) The paste usually (possibly not always?) cannot be undone. If the text had formatting applied, some or all of the formatting may be removed when attempting to undo, but the pasted text remains, and the file does not revert to "saved" status Using unformatted paste (selected through Paste Special / Cmd-Shift-V), the "Cancel" option works as expected, but the paste still cannot be undone. I can reproduce this in any new spreadsheet
Fixed in 3.5.1.
(In reply to comment #1) > Fixed in 3.5.1. That was fast! Thank you