RPH for InDesign CS4/CS5 allows you to detect hyphens that occur between two pages.

ReportPageHyphens 2.0 —presently in beta— is designed to solve most known issues and to provide some new features:
• the script now supports InDesign CS4 and CS5;
• it detects footnote page hyphens;
• the user interface has been (slightly) improved;
• you can quickly reach any reported page using the Goto Page button.