comment_upload having weird behaviour with "quote" module ...

Issue Summary

Since i've updated to the latest "comment_upload" module, it gives me strange behaviour with quote module ...

When i want to quote another user, i use the "quote" button, and i have a form with the quoted text...
The weird thing is if i ask to preview my answer, the original quoted text is pasted over my comment, like if the page was new...

To be clear, let's say i quote a text saying "hello"

Step1: click on "quote" from the "hello" message
Step2: I've got a new form with [quote=user1]hello[/quote] filled into the text area
Step3: I answer hi, so the textarea now looks like: [quote=user1]hello[/quote] hi ... and push preview button
Step4: I get my preview text, but the original quoted text is here twice, and the textarea is filled with: [quote=user1]hello[/quote][quote=user1]hello[/quote] hi

If i disable "comment_upload" module, i didn't have any more problem ... and if i push "save" button, i don't have the quoted text twice...

Any idea on this issue ?

Thanks in advance for your answer

Cya