Comment 21 for bug 761809

Without the quota modules, a server cannot have data quotas per user on the filesystem. This effects all versions up to Oneiric. When a person uses any kind of quota restriction whether it's manual, or via an application such as Plesk or CPanel, it will not work since these modules are missing.

Yes, this can be worked around by downloading a different kernel and loading up the modules from that kernel, but it is just that, a workaround. The environment we are using Ubuntu in, has automated deployments that needs/uses the -virtual kernel. It would cause more overhead to use this workaround every time we deploy a new Ubuntu box.

This is a standard module that is needed no matter what kernel or server is in use, and should be considered as a bug that needs to be fixed.