problem in RC9

I am exprimenting with importing/exporting and I wanted to delete all my rows. (300)
so i do showAll and than delelteAllrecords.

I'll get the following error:

Could not delete records, try ShowAll records (detail is empty)
only the current row is deleted.
What am I doing wrong?

BTW: delete one row gives the same error!

will be fixed in the final of 1.2