page down key wraps to last viewpoint from first, page up doesn't wrap from first to last.

[splace]

No description provided.

[create3000]

Cannot reproduce this behaviour. If I test the following minimal example everything works as expected.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.3//EN" "http://www.web3d.org/specifications/x3d-3.3.dtd">
<X3D profile='Full' version='3.3' xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' xsd:noNamespaceSchemaLocation='http://www.web3d.org/specifications/x3d-3.3.xsd'>
  <Scene>
    <Viewpoint DEF='_15'
        description='First'/>
    <Viewpoint DEF='_16'
        description='Second'/>
    <Viewpoint DEF='_17'
        description='Third'/>
  </Scene>
</X3D>

Maybe your test world is some kind of special, can you provide a test case that does not work?

[splace]

also cannot now reproduce.

unfortunately i had overwritten setup and cannot remember which file version/engine version.

closing until/if reproducible.