[pokita]

Same problem here with Kindle firmware version 5.4.2.

I also tried to create my own ACX using your excellent Wiki page, but with the same problems. The error I see in /var/log/messages is "TypeError: 'undefined' is not an object:exception converting eventRef to object". Here's the full log:

140404:225822 cvm[3419]: I AcxManager:handleMesquiteAction:targetId=com.lab12 6.gtranslation,action=onload,document=widget_//kindle.amazon.comx2Fnsx2Fwidgetsx2Fgtranslation_1. 8.12/index.html,sessionId=null:Handling event
140404:225822 mesquite[3965]: E JS.kindle.ACXReader:JSACXReader.callOnEvent:eventN ame=onbutton,exception=TypeError: 'undefined' is not an object:exception converting even
tRef to object
140404:225822 mesquite[3965]: E JS.kindle.ACXReader:JSACXReader.incomingAcxEvent:e vent=onbutton:callOnEvent failed
140404:225822 mesquite[3965]: E com.lab126.mesquited:WidgetFatalErrorEventListener .onEvent:targetID=com.lab126.gtranslation Widget has encountered a fatal error so we are
shutting it down:

Also, I had the problem that removing the acx file did *not* remove the entry in the context menu. It somehow got added on every boot because it was still registered in /var/local/appreg.db. After I restored that file from a backup, the entry vanished. So having a backup of that file is a good idea when experimenting with adding acx files.