All I did was hit the copy button on the technic page and then the paste button in the Add Mod gui that pops up, so it's Technics problem I suppose. But I made sure to copy the link you provided exactly as well(I've been using computers and copy/pasting for 25 years now) and it didn't work either, maybe it's a bandwidth or isp thing?
Doesn't matter though, I got a link that worked from ChatFawkes. This one: http://www.technicpack.net/api/modpack/flux-galaxy and his code for his private 1.7.10 pack on FTB, so no worries.