This is fixed on Intrepid with wget 1.11.4. Thanks!
** Changed in: wget (Ubuntu)
Status: New = Fix Released
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wget --mirror constantly re-downloads some files even though local/remote match
https://bugs.launchpad.net/bugs/224926
You received this bug notification because you are a
Small nit: 1.11 is also available and newer than 1.10.2; but it's buggy
(-ier than usual), so don't use it. ^_^
Debian already has 1.11.1 packaged up, so perhaps easier to sync from
them rather than write a debdiff for this one fix.
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wget --mirror constantly re-downloads some files even
