There is no any point to how I can reproduce this issue.
What you are talking about ?
Please provide good description of issue with steps of reproduce , result and expected result.

This is minor issue. The button that open a file chooser for some path that is stored into some field, should be opened
in the directory that is currently typed in that field.(if valid)

>The button that open a file chooser for some path that is stored into some field, should be opened
>in the directory that is currently typed in that field.(if valid)

This is exactly current behavior.
What is your behavior ?

Please provide ALL information if you still have this issue :
current behavior , expected behavior ( with some example ).

If that is exactly current behaviour, then there is no issue :-)

This is usability issue.
For example - I have C:/tmp/1 folder (directory) on my local disk. I type "C:/tmp/1" to the "Deployment Directory" and
apply "Browse". Path chooser will be opened in the "C:/tmp" but should be opened in "C:/tmp/1". You may say that this
isn't issue. But It irritates me when I do it more then two times. 
I am a customer and I hope that you will made my work more convenient. Am I right? ;-)

After some investigation I found this issue was reported against project properties dialog -> Application Descriptor
category -> BD-J tab.
org.netbeans.modules.j2me.cdc.project.bdj.BDJProjectCategoryCustomizer

File chooser is open in parent folder of typed folder, not in typed folder which is expected behaviour.

I consider this as not an issue.

Entered path is path to a file ( even if this file is represented by directory ).
So you have chosen some file in its parent folder. Pressing "Browse" button opens
folder which contains chosen path. Chosen path is inside parent folder and this is 
expected normal behavior.
It is absolutely consistent with other file choosers. F.e. consider "New Project"
wizard for pure  Java project. There is a "Project Location " folder control.
It has the same behavior as I described.