If it's the same one we discovered many months ago, they seem to have fixed it in 4.0.1. If there's still a problem with the 4.0.1 version I'd like to know about it! Steve. -- UUCP: ...!ukc!warwick!steve Internet: steve at maths.warwick.ac.uk JANET: steve at uk.ac.warwick.maths PHONE: +44 203 523523 x2657