This really smells like a nasty bug.

And the weirder thing is that, contrary to my previous experience, it now (vfp7.1) behaves OK with collating sequence "General", "German", "Iceland", "Nordan"... but returns .f. after reindex on "machine".

>I replay the problem in simpler way.
>
>

>CLEAR
>Create Cursor test(F1 C(2))
>
>Index On F1  tag Num
>
>Insert into test(F1) values ('A ')
>Insert into test(F1) values ('A'+CHR(0))
>Insert into test(F1) values ('B'+CHR(0))
>
>? 'Found() = ', KEYMATCH('A'+CHR(0)),SEEK('A'+CHR(0)),INDEXSEEK('A'+CHR(0))
>
>REINDEX
>
>? 'Found() = ', KEYMATCH('A'+CHR(0)),SEEK('A'+CHR(0)),INDEXSEEK('A'+CHR(0))
>
>LOCATE FOR F1=='A'+CHR(0)
>? FOUND()
>SELECT * from ALIAS() WHERE F1=='A'+CHR(0)
>

>
>Then, when a string Index expression can end with CHR(0), VFP index is bad.
>
>On Message #849429 i put a workaround.
>
>Fabio