The HSSF Record Type Id=0x1050 describes the font formatting for chart titles. This record will only be present if the Chart Title contains multiple font formats. The record is variable length, with the first short containing the number of format changes. Each format change consists of two shorts, the offset from the beginning of the title string and the font index that is should be applied to that text.
Created attachment 21055 [details] Sample workbook with Formatted Graph Title
Created attachment 21056 [details] Prototype class defintiion Sample code for a class to handle the 0x1050 record type. The modifyFormatRun method is one I needed to build a prototype for my use and would need to be enhanced to make it production-ready.
Thanks for this code. I've added it to svn, along with a sample test. Please feel free to open a new bug if you've got some new code to further extend the capabilities of record class, or to improve the test.