I am unable to seek a relation with the update of Reader having effect on Acrobat
since JS Debugger is available in Acrobat only. Can you mention the exact steps and machine details on which you are observing the problem?
This is not correct.
The difference to the one of Acrobat is, that you only can read but not execute things in the console.
Looks like a problem of your code.
to the second: i wilful made some errors in my code, just to show you what the console output is... sure if i make no mistakes in my code no signs will come. the curious thing is that the code, which cause the error, will be displayed in the reader 9 as a readable text and in the reader x in such chinese signs.