Yes. I had already checked the rest, but after downloading and compiling the new version of tumbler, and restarting the PC, the thumbnails appeared!
Thank you all

Please, someone knows how to enable it?
Thanks

Hello
I have installed salix xfce.
After I installed openbox and icewm
In these last 2 the trash can not appear in thunar. (Yes appear running xfce)
Investigating I saw that gvfsd-trash did not run, which does run automatically in xfce. But when I run gvfsd-trash manually, the trash doesn't appear ...