Testing our application on Win-8 x64, we found the following issue with Spire.PDFViewer:
When using the vertical scrollbar of the viewer component and scroll up *or* down with increased speed (using the mouse wheel), we will *always* get an "arithmetic overflow" exception.
We can ignore the exception and the application including Spire.PDFViewer will continue normally.
It will not happen on Win-7 32-Bit and it will not happen, if we scroll the mouse-wheel only very slowly.