viewing a ceratin .png in ristretto locks up Xfce

[Liviu Andronic]

Dear Xfce users,

I have this .png file [1] that locks up Ristretto and Xfce. The file
was obtained by .lyx --> .pdf --> screenshot in GIMP --> .png. The
same file is viewed without problems in Mirage or in Opera.

I also have a second .png file [2], obtained in similar way (actually
same LyX file), that Ristretto handles with no fuss.

Regards,
Liviu

[1] http://s000.tinyupload.com/index.php?file_id=35730800159401850311
[2] http://s000.tinyupload.com/index.php?file_id=35957761385436475614