This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
When user changes any boolean value, then ScrollBar moves suddenly up or down without any reason. It's disturbing a bit.
I'll see what I can do. Probably it's some default behavior wired into JScrollPane - noticing when child components are added or something. Probably it notices a component was added and assumes it out to make sure it's visible, and tries to scroll it into view. Hopefully it won't be too hard to find and disable.
I can't reproduce this in the current build. Note that the scrollbar *will* move if you click any property that it is partially hidden by the bottom edge of the property sheet. This is the default behavior of JTable, and scrolling a half-displayed value into view seems completely reasonable to me.