In Draw, insert a circle shape. Copy, paste as metafile into Writer document. Change anchor mode to "as character" -> no anti-aliasing anymore. Change back to "at paragraph" -> anti-aliasing works again.
Created attachment 42775 [details] Test file
Fixed by your patch sent to the mailing list and pushed to 3.4 branch. http://cgit.freedesktop.org/libreoffice/writer/commit/?h=libreoffice-3-4&id=d5885f16f6cbed93d1dc96703a084b9aaf9af32d
Hi Roland, You should attach yours test files (like antialiasing-metafile-test.odt with the equations) to this bug report. Big thanks for your patches :-)
Created attachment 48152 [details] Anti-aliasing of a metafile object
Created attachment 48153 [details] Anti-aliasing of a draw8 object
Assignee due to facts