Finally the next version has been submitted to the store. This one fixed incompatibilities with the new iPhone 3.0 software (phew). It took a little longer to fix as I ended up having to buy an iPod touch (refurbished) just to load the new operating system on it to try it out. Once I had the iPod touch it was easy to fix.
This new version also has one new feature: you can back up your bookmarks by emailing them. Not sure how useful people will find this, but I find it useful when developing as I often install and uninstall the application.
Have fun in the hot weather!