Change in behavior for thumb rendering of a nonexistent image: instead of using the icon size (120px) the hardcoded default thumb size (180px) is now used. Since this isn't really defined behavior there doesn't seem to be a pressing reason to change it back.
{{paramtest|
param =[[Image:noimage.png|thumb|[[no link|link]] [[no link|caption]]]]}}
!! result
-This is a test template with parameter <div class="thumb tright"><div class="thumbinner" style="width:122px;"><a href="/index.php?title=Special:Upload&wpDestFile=Noimage.png" class="new" title="Image:Noimage.png">Image:Noimage.png</a> <div class="thumbcaption"><a href="/index.php?title=No_link&action=edit" class="new" title="No link">link</a> <a href="/index.php?title=No_link&action=edit" class="new" title="No link">caption</a></div></div></div>
+This is a test template with parameter <div class="thumb tright"><div class="thumbinner" style="width:182px;"><a href="/index.php?title=Special:Upload&wpDestFile=Noimage.png" class="new" title="Image:Noimage.png">Image:Noimage.png</a> <div class="thumbcaption"><a href="/index.php?title=No_link&action=edit" class="new" title="No link">link</a> <a href="/index.php?title=No_link&action=edit" class="new" title="No link">caption</a></div></div></div>
!! end