Hi,
If you are using the Adobe Flash Player make sure you update to Adobe Flash Player 10.1.82.76 ([released by Adobe on August 10th 2010|https://www.adobe.com/support/security/bulletins/apsb10-16.html]).
As well as having the latest security fixes this update also fixes the Adobe Flash Player bug that stopped Xcelsius SWFs from working when you embedded them into a PPT: https://www.adobe.com/support/security/bulletins/apsb10-16.html
FYI: Xcelsius is based on Adobe Flex and this bug also affected any Adobe Flex based SWF that was embedded into a PPT not just Xcelsius.
Regards
Matt
