After yesterday’s trouble, I just upgraded all my plugins.
Gengo’s URI renaming scheme with language code at the end was leading to an infinite redirect (adding fr+en/ to the URI) so I had to disable it. But doing so breaks the existing URI on your bookmarks (if you had some) and on Google…
So I hacked gengo again so that if the URI ends with a language code, it is redirected to the basic URI.
A recent reading : Cool URIs don’t change is just about keeping the URI, here I’m redirecting, that’s not as good, but at least you wont get the 404 
The link was on Peter Eisentraut’s Blog. I was reading his article about Remove and Purge. I was tempted to do the same, I even did for a few days. Then I read the comments, and ended using aptitude l~c view . I was previously using synaptic only for purging residual configuration…