[yocto] version problems about SDK

[Ke, Liping]

Hi, Jessica & Josh

When we are trying to run installer script on lianhao's x86_64 machine, we found if the images are build in two days, according to current version naming convention, some of the packages will be installed to /opt/poky/0.9+snapshot-20101210, some will be to /opt/poky/0.9+snapshot-20101210. 
It will cause problem since we need to know the exact version number before installing and searching some files (environment script file, etc). And the same releases of packages belong to different version (just the build date is not in the same day) seems very strange and hard to handle for us?

Thanks& Regards,
criping