I have a long description,but when I use "" or add some link ,it do not work,
then in 1.1.7,it will work.how to do with it?

Please try the nightly.

thank you

the same error as before.how to do it?

There is an option for allowed_tags which controls which markup is allowed. That option is on the comment configuration tab in the 1.2 release but is moving to the gallery configuration tab so if you are using a nightly built it will have moved there.

The default setting does not allow the tag so it gets stripped out.