The new launcher is giving links such as:
http://losangeles1.creeperrepo.net/FTB2/modpacks^Unleashed^1_1_4^Unleashed-server.zip
which should be:
http://losangeles1.creeperrepo.net/FTB2/modpacks/Unleashed/1_1_4/Unleashed-server.zip
Part of the address is URL encoded when it shouldn't be, replacing /'s with %5E's.
http://losangeles1.creeperrepo.net/FTB2/modpacks^Unleashed^1_1_4^Unleashed-server.zip
which should be:
http://losangeles1.creeperrepo.net/FTB2/modpacks/Unleashed/1_1_4/Unleashed-server.zip
Part of the address is URL encoded when it shouldn't be, replacing /'s with %5E's.