Čtyřicetdva

C-O-D-O-S-T-A-N-E-T-E-K-D-Y-Ž-V-Y-N-Á-S-O-B-Í-T-E-Š-E-S-T-K-U-D-E-V-Í-T-I-?

It happens when files are moved to recycle bin from removable drive. You have to exclude removable device from moving deleted files to recycle bin.

Source: http://www.sevenforums.com/general-discussion/167047-recycle-bin-doesnt-show-files.html