Crystal reports word document size

Using C# windows app and Crystal Reports 11.

In my system you can generate a report (containing pictures / graphs etc) and then export that report to word/pdf etc.

If you export to .pdf the file size is in the region of 300k. But if you export to word the document it creates is around 14Mb. However if you then open that document in word and 'save as' it reduces the file size right down to around 400k.

Is this a common problem? Is it possible to force crystal reports produce a smaller document?

Cheers.