Hi,
I can certify this bug. I have tested it without a form in an empty database. I have just opened the XPage in the browser and clicking on the button. It provokes replication conflicts after each click.
<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core"
xmlns:xc="http://www.ibm.com/xsp/custom" pageTitle="test">
<xp:this.data>
<xp:dominoDocument var="document1"></xp:dominoDocument>
</xp:this.data>
<xp:button value="Label" id="button1">
<xp:eventHandler event="onclick" submit="true" refreshMode="complete">
<xp:this.action>
<xp:saveDocument></xp:saveDocument>
</xp:this.action>
</xp:eventHandler>
</xp:button>
</xp:view>