A workaround is to add the following script override after your script manager that will change the default URLs used for the third party scripts:

Telerik.Web.UI.RadSocialShare.SocialNetUrls =
{
    "ShareOnTwitter": "http://twitter.com/intent/tweet?url=[u]&text=[t]",
    "ShareOnGooglePlus": "https://plus.google.com/share?url=[u]",
    "GoogleBookmarks": "https://www.google.com/bookmarks/mark?op=add&bkmk=[u]&title=[t]",
    "LinkedIn": "//www.linkedin.com/shareArticle?mini=true&url=[u]&title=[t]",
    "Delicious": "http://delicious.com/save?url=[u]&title=[t]",
    "Blogger": "http://www.blogger.com/blog_this.pyra?t=&u=[u]&n=[t]",
    "Digg": "http://digg.com/submit?url=[u]&title=[t]",
    "Reddit": "http://www.reddit.com/submit?url=[u]&title=[t]",
    "StumbleUpon": "http://www.stumbleupon.com/submit?url=[u]&title=[t]",
    "MySpace": "http://www.myspace.com/Modules/PostTo/Pages/?u=[u]&t=[t]",
    "Tumblr": "http://www.tumblr.com/share/link?url=[u]&name=[t]",
    "MailTo": "mailto:?body=[u]&subject=[t]",
    "ShareOnFacebook": "http://www.facebook.com/sharer.php?u=[u]&t=[t]",
    "linkedInPlatform": "//platform.linkedin.com/in.js?async=true",
    "facebookscript": "//connect.facebook.net/[locale]/sdk.js",
    "googlescript": "//apis.google.com/js/plusone.js",
    "twitterscript": "//platform.twitter.com/widgets.js",
    "ga": ".google-analytics.com/ga.js",
    yammerscript: "https://c64.assets-yammer.com/assets/platform_embed.js",
    ShareOnYammer: "https://www.yammer.com/home/bookmarklet?bookmarklet_pop=1&u=[u]&t=[t]",
    PinIt: "//pinterest.com/pin/create/button/?media=[m]&url=[u]&description=[d]",
    pinterestscript: "//assets.pinterest.com/js/pinit.js?r=" + Math.random(),
    ShareOnPinterest: "//assets.pinterest.com/js/pinit.js",
    pinterestBookmarkletScript: "//assets.pinterest.com/js/pinmarklet.js"
};