weird error /etc/cron.cyclic/makegraphs:libpng error: Read error

[Guest]

[waps]

Hi,

I've run efw-upgrade 3 days ago and now I have a weird error on one of the cron.cyclic jobs.

here it is:

Code:

/etc/cron.cyclic/makegraphs:
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error
libpng error: Read Error 

Anybody got that one?