Excel 2013 displays an curved arrow instead of a rectangular shape as comment box in excel file created from xssf class library (2.0.1 beta). The picture from generated test.xlsx example is in attachment.
Excel 2010 displays same file correctly.
Comments: ** Comment from web user: tonyqus **
Excel 2010 displays same file correctly.
Comments: ** Comment from web user: tonyqus **
I can reproduce the issue. This will become a workitem