Hi, a user reported a bug in the MinGW version of mpop. After narrowing the problem down, it seems that after 'fseek(f, 0, SEEK_SET)' is called for a file 'f' that was opened in mode "r+", subsequent attempts to write to 'f' (e.g. with fprintf) will fail on MinGW when the gnulib fseek module is in use. The fseek module uses the fseeko module, which in turn uses the lseek module.
Disabling these modules (using --avoid) fixed the problem for the reporter. I currently do not have access to a Windows system to investigate this further myself. Martin
