Graphics, Figures & Tables ⇒ Vertical Placement of Figures with long Captions

[marvelty]

For figure floats that are 'bumped' to a new page, the figure graphic is vertically centered, and the caption below. In some cases, this forces the caption past the bottom margin, overwriting the page number. There appears to be sufficient white space at the top of the page that if the figure aligned at the top margin, everything would fit. I have attached an example page of this type of caption fail (please forgive the dry content). Is there a way to force the vertical alignment?

I have tried selecting "top of page" in the floats placement options as well as using \raggedbottom in the preamble. I have also tried setting the figure to clip to a bounding box (they are all PS graphics), all to no effect. I am using LyX 2.0.3 with a custom document class provided by my university.

Thanks for your help.