I've seen this before and it happened again. The trash function works properly, including trash icon in Nautilus places. This time I deleted all thumbnails using nautilus by selecting them all with CtrlA and using the Delete key. They appeared in trash. When I booted the next day I noticed I hadn't empied the trash so I use the trash applet to do so. It still says 853 items in trash. I double checked home and root trash which are both empty. I deleted more files and emptied trash again. Note than when deleting files the reported number of trash items didn't change. The only way to clear the problem I could find was to remove the trash icon and add it back.
I've seen this before and it happened again. The trash function works properly, including trash icon in Nautilus places. This time I deleted all thumbnails using nautilus by selecting them all with CtrlA and using the Delete key. They appeared in trash. When I booted the next day I noticed I hadn't empied the trash so I use the trash applet to do so. It still says 853 items in trash. I double checked home and root trash which are both empty. I deleted more files and emptied trash again. Note than when deleting files the reported number of trash items didn't change. The only way to clear the problem I could find was to remove the trash icon and add it back.