The assumed Seek() position in the file cache was off by one byte.
diff --git a/builds/amiga/src/base/ftsystem.c b/builds/amiga/src/base/ftsystem.c
index 6a6f212..ffedfa0 100644
--- a/builds/amiga/src/base/ftsystem.c
+++ b/builds/amiga/src/base/ftsystem.c
@@ -305,7 +305,7 @@ Free_VecPooled( APTR poolHeader,
if ( (offset < sysfile->iobuf_start) || (offset + count > sysfile->iobuf_end) )
{
/* requested offset implies we need a buffer refill */
- if ( !sysfile->iobuf_end || offset != (sysfile->iobuf_end + 1) )
+ if ( !sysfile->iobuf_end || offset != sysfile->iobuf_end )
{
/* a physical seek is necessary */
Seek( sysfile->file, offset, OFFSET_BEGINNING );