Which font file(s) did you replace?
Which font name(s) are Chatter and Skada configured to use?
What region/language do you play WoW in?
Are all of your other addons (specifically, all addons using LibSharedMedia-3.0) up-to-date with versions released after September 7th? Without any other information, I'd guess that the answer to that question is "no", which means that you simply need to add more override files to your Fonts folder to match the additional files Blizzard added in WoW 5.0.4 (which LSM3 was updated to use on September 7th). There is a full list of the new files here:
http://www.wowinterface.com/forums/s...064#post259064