What kind of Concurrency issues should I guard against while writing components in JSF?
I use JSF1.2 for our application and I am a component writer . So what kind of threading/concurrency issues should I be aware of while writing JSF components and Managed Beans ?  Do such assumptions change if I switch to 2.0 later ?
What kind of Concurrency issues should I guard against while writing components in JSF?
===

I use JSF1.2 for our application and I am a component writer . So what kind of threading/concurrency issues should I be aware of while writing JSF components and Managed Beans ?  Do such assumptions change if I switch to 2.0 later ?