- run attached zul under 3.5.0-Eval
- type arbitrary value in A2, A3, A4, e.g. a,b,c
- select A1, click "Add Validation" button to set a validation with "display drow-down list" option
No down-down list appear in A1
If you click "Add Validation with array" to set validation at A1 and type "d" in A1, then drop-down will appear.