Comment 8 for bug 1436690

The problem is caused by one of your icon files, "Ramandue's Daughter.png", having an apostrophe in its name. This apostrophe causes the coloring system to fail.

Fix it by removing the apostrophe from the file name in cc_icons, starting calibre, going to preferences / use and feel / column icons, and changing the two rules that use the name "Ramandue's Daughter.png" to instead use the name "Ramandues Daughter.png".