Thanks for reporting this. Could one of you upload a savegame where this is happening?
Thanks for this. I'll look some more at it, because I remember having a similar theory when getting sidetracked with other things.I don't know if any extra information is required for this (I didn't see it reported as a fix in the 1.05 patch list), but I noticed that it only happens for titles that are not currently held (e.g. Italy and Burgundy at game start), and as long as you go to an actual historical ruler of the title (who died holding it I guess), then the history comes up fine. If you use the "de jure" checkbox on the title page to find the information for a de jure kingdom that isn't currently held, and then click on the history button, then it seems like the history gets wiped, and cannot be restored by doing a save and reload. The information doesn't appear to be restored when you (or someone else) create the title.