The x86 version of imlib2.tcz is missing libXext.tcz from its dependency file.
imlib2.tcz.dep has been fixed for TC5 through TC12. Only the x86 version was affected.
To update your system:
tce-audit builddb
tce-audit updatedeps
tce-audit fetchmissing
tce-update
Then reboot.
This would only affect programs that don't need a GUI and depend on imlib2 in a non-GUI system installation.