Thanks for doing the experiments and posting back. For some reason MS changed the default settings in text boxs for Pub 2010, but now at least you can copy and paste a page in two steps.
You have figured out how to copy and paste the text boxes and keep the source formatting. Let's make that the second step.
The first step is to copy and paste everything else on the page. To do this first make sure that you have the 'Home tab' selected in the menu and that you can see the 'Group' command under the 'Arrange' group. Then instead of using Ctrl + A or 'Select all' to select everything on the page, starting at the top of your page, hold down the Ctrl key and click/select each individual design element on the page, excluding the text boxes. Once you have clicked/selected all the other elements then 'group' those elements together. You can click the 'group' icon under 'arrange' or you can use the shortcut Ctrl + Shift + G.
Now you can copy and paste that group of elements onto the other page in one step. Then in step two, add the text boxes.
Granted this is not as easy as copying the entire page in one step but it will at least save you the time of copying and pasting each of the non-text box elements and it will help you maintain the layout of the page.
DavidF