Refraction not work in multisub material

V-Ray V-Ray for 3ds Max Issues
1

if i use refraction slot in multisub material - object render as black
if i use refraction whit out multisub material all ok

Max 8.0 +SP vray 1.5 RC3 + WinXP

2

This is a known issue in RC3; it is already corrected for the next release.

Best regards,
Vlado