I converted a pdf to docx using acrobat and ended up with some fonts sized at 21.5 and 22.5. Using Word 10 I could find/replace these fonts with something smaller. Using LO Writer 3.6.4.3, however, attempts to search on a font size of 21.5 were unsuccessful as Writer rounded off my desired font size to an integer and thus the find failed.
Hope this can be fixed in the future.