I've created a demo of an apex:select with an apex:actionSupport component to illustrate the problem. The source code for the demo is also available.
What I expected to happen:
- Change the picklist value.
- Observe that assignToColor matches picklistColor.
- Observe that displayColor matches picklistColor.
What actually happens is that nothing changes except picklistColor.
Is this a bug or is this expected behavior? I thought that apex:param could be used with apex:actionSupport components.