Gmail Mobile on k530 looks different after re-installing - WTF?

I have a Sony Ericsson k530i.

Yesterday I upgraded Gmail Mobile from 1.1.1 to 2.0.6, but I didn't like the new version because the two bottom buttons (menu and refresh) were bigger and uglier (2.0.6 was using my phone's native softkeys), and the buttons had changed place (on 1.1.1 it used to be refresh on left side, and menu on right side, but on 2.0.6 it was the other way around).

I decided to delete 2.0.6 and install 1.1.1 again, but somehow, this little quirk persists. I decided to try 1.5, 1.1.0 and 1.0.0 as well, but had no luck with those either.

I don't know how this can be. I tried to look for a setting, both on my phone and in Gmail Mobile, but couldn't find anything related to my problem.

How is this happening and is there a way to fix it?

Here's a little mockup image I made to illustrate my point:

http://i31.tinypic.com/2ivh63l.gif

So, as you can see, it's a lot worse now.