JD_Toims - 7:23 pm on Aug 1, 2013 (gmt 0)
Personally, I'd fix them. Even if they're not an issue right now with how Google handles your site and rankings who knows about tomorrow or other search engines?
It would suck to leave them the way they are and wake up one day to find they're causing a ranking issue and have traffic drop while your waiting for the fix to make it through the system.
* If you can't get the .htaccess working rel=canonical to the non-double slash location should cover it with the major SEs at least.