Since Tumblr changed some styling code, One-Click Reblog, Reblog Yourself and GetAudio icons were messed up and/or not showing up at all.
I’ve pushed an update to One-Click Reblog a few days ago, and today I’ve pushed updates to fix Reblog Yourself and GetAudio extensions.
You should get the new versions of these extensions automatically in a few hours.
Thank you for your patience, and thank you for using XKit. =)