This issue is caused by the difficulty of printing/scanning data of off_t type. Since the off_t type can vary in size between systems, a single print format cannot be used. This specific issue was driven by the inappropriate use of casting to get around this problem -- the casting sometimes violated optimization rules.
This issue has been addressed by reworking the code to use an implementation-dependent print format code 'OFF_T_FMT', which depends on the state of the LARGEFILE configuration. This macro is sometimes set of %ld and sometimes to %jd (appropriate for intmax_t).
fix is on the trunk in r28241
