Actually, there was a translated article from 'Iran News Press' on March 12, 2006, posted on Doc Zin's blog saying this:
Akbar Ganji's Release from Prison Denied -
"The regime's judiciary has decided to rescind Akbar Ganji's release from prison. Sources close to Ahmadinejad's site FARDA (named as such in order to confuse people with Radio Farda which is the Persian Broadcast of Radio Free Europe) have reported that Ganji who was slated to be released from prison for having served his 6-year term, on March 15th, was denied his acquittal. The source refused to give any more details."
http://regimechangeiran.blogspot.com/2006_03_12_regimechangeiran_archive.html
Anything is possible. There have been conflicting stories about his release for some time now.
Lets hope he is actually released and won't be re-arrested and jailed again.
I saw that article the other day. But this sounds for real since they actually have a picture of him, a quote from his wife, and reporters described the scene inside his home.
I think the regime was trying to release him quietly, so they first floated the story we read the other day about not releasing him.