I have set FM up and have created the same problem. It seems to be as if FM does cut the line in half.
My work around:
1. In the Layout mode drag the large text box so that it goes over the page marker on onto the next page. set the font and size of the font as you want it. Set the page set up to the printer you will be using. (I am not sure what will happen if you later re set the page set up to another printer that has a slightly different page size)
2. In the Layout Mode Align the textlines so that the textline nearest the page break line is exactly in line with the page break line. The text will be cut at this point so if the match is exact it will cut the text between the lines and you won't have bits of it on each page.
There may be a better way but FM is not a word processor.
I had already had a play with doing it that way, I found it impossible to get the page break to align perfectly with the text. With 6000 + records its variable as well, depending on the paragraph breaks etc in the description field.
More a more in depth discussion on this bug see: FM11 printing? "Only one half of a line prints" again, like FM6
This is one of many acknowledged bugs that can be found in the Known Bug List
It is also available as a free filemaker database file at: http://www.4shared.com/file/8orL8apk/FMP_Bugs.html
It beggars belief that software could have been released with such a serious bug - and then months later there is still no fix!
My clients are developing a compelling argument for finding a better application to manage their databases!