I had the same problem with Harley. It was caused by a setting I had made in Windowblinds.
If you have the Windowblinds program installed as well as MyColors, go into Windowblinds configuration. Click on the "Fonts" tab in the second row at the top. Click on the "Reset" button towards the middle on the right side to set the font sizes to normal. Make sure the 2 checkbox items in the middle of the window are unchecked. In the scroll window underneath the sentence "Do you want to override the font defined by the skin?" make sure the 1st item "Allow the skin to decide on the fonts" is highlighted - if it's not, scroll up to it and click on it. Finally, click on the "Apply changes" button in the upper right of the window.
Maybe that will get it for you, it did for me.