Since last upgrade (2013-12-03) scan images from DJVU/PDF files are not displayed on pages linked from index pages. About 90% of our index pages are created with pages listed individually sometimes from multiple DJVU files.
Examples of index pages with non-working pages (non-displayed images):

https://pl.wikisource.org/wiki/Indeks:Porozumienie_w_przedmiocie_%C5%9Bcigania_i_karania_g%C5%82%C3%B3wnych_przest%C4%99pc%C3%B3w_wojennych

https://pl.wikisource.org/wiki/Indeks:Latarnia_czarnoxi%C4%99zka_%28Kraszewski%29

24h ago everything worked fine.

Version: unspecified
Severity: critical