Created attachment 90787 [details] example Document LibreOffice 4.3 Alpha 0 2013-12-09 It's not exporting the background image to ODP file, who comes from a PPTX, but when is exported to PPT or PPTX works fine, but if you export it to ODF, it's not stored the background image in the file.
Created attachment 90789 [details] file Exported to ODP no background image it only fails with ODP, exporting the "example Document" to PPT or PPTX it looks ok.
already known issue. see Bug 63253 *** This bug has been marked as a duplicate of bug 63253 ***