Hi Lee,
Sorry for the delay.
I have a sample worked up which uses Syncfusion assemblies along with BO's crystal report assemblies. Its working same as before. Also there is no assembly dependency between Syncfusion and BO. Please check out the sample from the following link,
http://www.syncfusion.com/Product/uploads/Sf_BO_Sample_5e81e58b.zipPlease let me know with a sample to reproduce the issue which you have mentioned.
Thanks,
Fahad