Last weekend I noticed that the extra field sale_price was not showing in the XML file and I found that the g:price field was mapped to the price value, so I changed that to regular_price as described in the manual.
That change did the trick and all products in the XML file contained a proper sale_price.
But today, only 1 product has a sale_price.
Can anybody help me out here?
PS, the plugin is updated to its latest version.