adress-book memo-field

Hello Everybody, in my adress-book, a few of my contact (not all, that makes it so strange) have this in the other - memo-field:
Binary
anyone got any idea what this is how it got there? (i've never used the memo-field untill now, so tb! must have putted it there...) or is

Re: adress-book memo-field

Hi there! On 19 Jan 00, at 16:53, Roel wrote about "adress-book memo-field": in my adress-book, a few of my contact (not all, that makes it so strange) have this in the other - memo-field:
Binary
anyone got any idea what this is how it got there?