Last modified: 2008-05-26 09:23:47 UTC
The SVG image http://en.wikipedia.org/wiki/Image:Screen_tone_example.svg displays as a PNG, and the PNG looks fine. However, when it's included on http://en.wikipedia.org/wiki/Screentone , the thumbnail appears as a blank PNG, http://upload.wikimedia.org/wikipedia/en/thumb/9/91/Screen_tone_example.svg/250px-Screen_tone_example.svg.png .
This seems to be a problem with thumbnail image sizes - If the thumbnail code specifies a size, then the SVG thumbnail may not display. For example, the following code works with size as 237px, but at 238px it does not work: [[Image:NZ Regions.svg|right|thumb|237px|Regions of New Zealand]]
It seems to work properly, see http://test.wikipedia.org/wiki/Bug_9113 Probably fixed some time ago, marking as WORKSFORME, reopen if it happens again.