I've found this problem on scribus version 1.3.3.13, 1.3.5.1 and 1.3.6svn under windows.
I made e file contains multiple image fame PS/EPS/PDF. Save it... close scribus.... reopen scribus.... reopen saved file.... Scribus progress bar goes slowly until a value (sometimes 20%, others 60%, oters 90%) and stop to increase his value. Scribus take 50% of cpu but don't do nothing... I try to wait 24 hours..... It seams that scribus invoke ghostscript (V 8.70), ghostscript die and scribus wait infinitely for ghostscript data. If file has some image frames contains PS/EPS/PDF graphics I need to kill and reopen scribus 2/3 times before be able to reopen file. If file has many image frames with ps data I can't reopen file anymore. Same files reopenend on scribus 1.3.5.1 on linux works fine.... I think this is a bus in win32 porting of scribus.
