Ma.gnolia's screenshot/cap feature is a welcome visual element, however the shots grabbed often fail to adequately represent the page bookmarked.
Whatever scraper is used to gather the screencap, it would be nice to offer the user 2-4 image options from which to select, so only the most representative is displayed.
Moreover, the fixed size of the screenshot is too small. Although bandwidth costs are of course an issue, Offering S, M, and L options - for both local display within Ma.gnolia and externally via posting tools - would dramatically improve the value of this feature.