Hi. I found you are the libpoppler's maintainer, so I contact you to get some help. When I use poppler to render some pages in multiple threads, it often cause crashes. But, When I use mutex to lock it, like: pthread_mutex_lock (&rendermutex); poppler_page_render_to_pixbuf (page, 0, 0, ix, iy, zoom, 0, buf); pthread_mutex_unlock (&rendermutex); this problem be solved. So, I want to known, if libpoppler has some shared resource made use can't use in multiple threads applications? and, I use poppler <a href="http://0.10.0./" target="_blank">0.10.0.</a> Thank you! --   ,= ,-_-. =. ( (_/)o o(\_) )    `-'(. .)`-'        \_/