I can't unzip idea1002-jre.zip (from http://www.intellij.net/eap/products/idea/download.jsp ) either on XP or Solaris. unzip tells me that it's not a valid zip archive. Obviously it's working for some of you, since no-one else seems to be complaining. I get similar errors if I download the windows installer for 1050 that includes this file.
Please speak if you've also had problems with this.