summary:
there is only an error dialog box when i want to "save copy as" an object like 
a chart in writer.

steps to reproduce:
* open writer
* create a table, values 1 2 3, whatever
* insert>object>chart ... 
* now, select the chart object and right click on it, the bottom entry says
"save copy as ..." -> error box

i think, this should do the same as:
* select object
* copy
* open draw module
* insert (sometimes normal insert, sometimes insert as GDI metafile ...)
* in draw: file>export selection>... {EPS, jpeg ...}

in writer it would be very convenient to have this right there, for eps, jpeg
and so on.