terminate called after throwing an instance of 'std::length_error'

[GoogleCodeExporter]

I am running the latest modpagespeed on my site - www.sellmyretro.com, running 
on Centos 5.7.

I have never noticed any issues whilst using the site, but noticed an odd entry 
in my logs this morning:

[Thu Sep 22 08:01:37 2011] [error] [mod_pagespeed 0.9.18.7-900 @8658] 
x1590_DSCI0088_100px.JPG:0: Unrecognized image content type.
terminate called after throwing an instance of 'std::length_error'
  what():  basic_string::append
[Thu Sep 22 08:03:10 2011] [notice] child pid 7739 exit signal Aborted (6)
[Thu Sep 22 08:04:51 2011] [error] [client 66.249.71.49] File does not exist: 
/var/www/html/cache


Any ideas what is causing this?

Original issue reported on code.google.com by sexy.ric...@googlemail.com on 22 Sep 2011 at 9:07