Thank you very much,I have got the reason.That's my fault to wrap html file in @-tags,and it seems that the html token can not be write in post text.I will report this to Beta Testing Forum,Thank you very much!
[quote author="Volker" date="1320499603"]Something really strange is going on here, as your other comments make it through.
I suggest you test this issue in the "Beta Testing Forum":http://developer.qt.nokia.com/forums/viewforum/5/. Just open a new thread there, stating that you test an issue. I now would post just the first sentence, then add new comments containing just one more paragraph each, until the error shows up again, then remove that paragraph, and add sentence for sentence of that paragraph, then word for word just to boil down at which excact place the error occurs. Maybe this can track down the cause. Also, it can be that you discovered a subtle error in the forums software, as that usually rejects empty posts! The Beta Testing forum is the right place for that, you don't need to bother about "polluting" something there. [/quote]