HVGA, QVGA etc refer to the resolution of the device you are running it on. Depending on how you set up your layouts (if you are using absoluteLayouts etc) this can cause them to look slightly different on different resolutions.
Create a different layout for small, normal and large screens by adding folders layout-large, and layout-small etc and adding views with the same name within each of these folders. Android will then find the most appropriate layout to inflate for the device that the application is currently running on.
There are some useful articles here:
http://blog.stylingandroid.com/archives/category/layouts[
^]
Hope this helps.
Submit an article or tip