Last modified: 2011-08-19 20:26:09 UTC
Please see above URL
$ w3m -dump http://en.wikipedia.org/wiki/Free |fgrep [|head -n 1
The alt text on the Wiktionary logo is explicitly blanked in the wiktionary template like so:
<div style="float: left;">[[Image:Wiktionary-logo-en.png|50px|none|Wiktionary|]]</div>
This is likely done because the logo image is redundant in a text-only environment.
Since there could be a legitimate difference of opinion and there's no technical bug at issue, I'm going to refer you to the talk page for the template on this one: