I have been pleasantly surprised that we have not seen many reports of iPhone OS 3.0 negatively affecting any apps. That said, the first report that I am seeing is coming courtesy of jkOnTheRun who are reporting that OS 3.0 breaks eReader Pro.
It was noted that the bookshelf part of the app no longer works, however you can still use the reader part of the app. That said, Fictionwise, who are the team behind the app are already aware of the issue and have already submitted a fix. Now they are just waiting for that new (and fixed) version of the app to hit the App Store.
In other words, if you are an eReader Pro user then just hold tight your app should be back to normal soon.

June 18th, 2009 at 9:34 am
Does anyone know if adobe flash palyer is in the 3.0?
June 18th, 2009 at 9:37 am
Another app with problems in 3.0 is WIFITRACK. It just can’t connect to the wifi scanner of the iPhone.
There is also a fix sent to app store, but not available yet !
June 20th, 2009 at 8:22 pm
Dirbling, Flash is NOT in OS 3.0. Won’t happen for a while.
I’m sure there’s quite a few app updates heading to the App Store right now…might be a while for eReader. I’m just glad that Stanza works as a backup for eReader/Fictionwise content. Too bad I utterly hate how Stanza RENDERS said eReader/Fictionwise content. >.<
June 22nd, 2009 at 2:00 pm
Thanks, I thought it was just me! I can still read the book I’m currently reading, but I can’t go to my bookshelf to switch to a different book. I’m glad to hear there’s a fix in the works!
June 23rd, 2009 at 5:02 pm
Thanks for the update…I sure hope it is “soon”…I’m going to go crazy waiting to read my next book!
June 24th, 2009 at 9:33 pm
Jodi –
You CAN download one book at a time. Just delete and reinstall the ereader app and you’ll get your one opportunity. It’s a pain, but it works!
June 25th, 2009 at 12:37 pm
Thanks, I thought it was only me! Looking forward to it!