Major:
No error message when starting without headphones or when trying to start radio from menu. Not obvious to all people who install stuff from extras! Remember that we are dealing with completely different people when going to extras!

Glitches (Warning! Short list "effective hopefully not rude" and of course these are just opinions )

Seek doesn´t work properly for me. It finds channels but skips many channels that are just fine.

I would like to scroll trough frequencies with volume bar like solution. Or maybe just swiping up&down /right&left of number display to scroll trough frequencies. (oh dear rejected...)

In settings "use camera button" FOR what? (change station from camera button)?

Hmmmm why there is static frequencies below display and additionally there is station list. Confusing.

Could enable speakers button be besides volume bar (changed from speaker icon to headphone icon depending on state)

How about manual frequency popup when tapping frequency display?

Is there template for about/help page in packages repository?

Layout position changes when there is RDS text displayed.

Activating set should IMO be right behind first tap to top bar and changing the names of set behind settings as it is right now.(So that active set is highlighted like this link)

I like the possibility to change font size and the most user friendly way would be in way that you could see dynamic preview of font size right besides the +/- setting.

.edit
I think that these were dialogs that you are able to attach&customize to your app if you want.
http://wiki.maemo.org/Hildon-Extras#Widget_Gallery
Slap me with trout if I´m completely lost