Absolute values as opposed to references

[Jordi Bunster]

Is there any reason in particular why certain things are static, such as 
the Operating system in a bug? Is there any particular reason why they're 
not simple references to another table with (opsysid, desc) or something 
similar?

Also, is there any particular policy that dictates that a bug description 
should not be changed, as opposed to just adding comments?

 -- Jordi