Comment 0 for bug 508969

User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3

This happens even on this bug report page.
This problem should be Firefox related, not how the webpage is written.
How I found this problem was when I was copy & pasting text from one place to another.
Since I had many to copy & paste, I was copying from left and paste on the right very quickly. Sometimes, I miss clicking the textarea I need to paste on, and just click on the border and paste. Usually this doesn't and shouldn't do anything, I just clicked on the edge, but when this problem occurs, the textarea/input area disappears right after the pasting.
Also, very rarely, the pasting text will be implanted in the html just as text.

Reproducible: Sometimes

Steps to Reproduce:
1.copy some text, whatever is fine. can be just some lines.
2.try clicking the edge of input/textarea and paste(use "ctrl+v" to paste)
3.sometimes the input/textarea disappears, like 1 out of 10-20 tries
Actual Results:
input/textarea disappears

Expected Results:
shouldn't remove the elements