Skins do not work on my client

All of the skins on my client are Steve. Originally, player heads were also Steve, but I deleted my "versions" file, which fixed it.

This glitch only happens in 1.7.5 and 1.6.4, but Jira will not let me select those versions anymore.

In versions prior to 1.7.7 I retain my cape.

My friends see skins correctly.