Major Bug - Crash an 4.0 ODS file if insert into an existing region of a Calc 3 file, not into new section, and not if edit as an XLS file.
Inserting a row into an existing area crashes a Calc ODS file if it was created in < 4.0
If save as XLS it does not crash and I can edit either in Calc or Excel.
If I insert a new sheet in Calc 4, I can insert a row in that in an ODS file.
Then going back to the existing sheets in an ODS file, insert will crash Calc 4
Reinstalled Calc 3.4.1 can open, insert & delete rows in existing regions w/o crash.
However, cannot remove detective traces in 3.4.1 left over from version saved from 4.0.1, nor remove in Excel.