All error bars of charts from Calc disappears when copying and pasting into Writer, Impress, or Draw. On the pasted chart, when you right click into "Chart Data Table", you will find that the columns of "Positive/Negative Y-Error-Bars" are missing. Those columns were present in 3.6.
This bug is possibly related to Bug 52159, but I'm filing a new bug because the symptoms are different. And also because after reading that LO4 will be default in Ubuntu 13.04, I feel this really needs to be fixed!
That is most likely also an import & export bug.
See Bug 60083
Confirmed on 18.104.22.168, changing version to reflect this as version field represents oldest confirmed version where issue is present.
Bodhi Linux 2.2
Major (confirmed what reporter marked as, loss of data)
High (default for major, seems appropriate)
Actually a dupe of 56730, marking as such
*** This bug has been marked as a duplicate of bug 56730 ***