I tested three Wodehouse books here done by Jellby (The Man Upstairs, Uneasy Money and The Man with Two Left Feet). All of them was missing a @page specification which lead to no top margin on my Gen3 and the top line being shadowed. To fix this I added in the css file:
Code:
@page { margin-top: 2ex; margin-bottom: 1ex }
That at least solved the problem with the top margin and no new problem occurred with the bottom margin.
So it would be very good if all ePub uploaded here contained a @page specification. Maybe that could be added in the instructions? The exact values to use could be debated but it should be at least one line. Maybe 1ex is enough but I think 2ex looks better.
It seem that the PRS-900 also have problems with shadows (see another thread at MR).