I'm having the same problem with one user's mailbox. Two separate emails with attachments show the paper clip attachment icon but there seems to be no attachment to view or download.
Doing right-click "Show Original" does show me that the file is there:
Code:
--------------020505000201060103090806
Content-Type: application/pdf;
name="050609.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: inline;
filename="050609.pdf"
JVBERi0xLjQNJeLjz9MNCjkgMCBvYmogPDwvTGluZWFyaXplZCAxL0wgMjExOTcvTyAxMS9F
IDE2MjIxL04gMi9UIDIwOTcxL0ggWyA3MzYgMjEwXT4+DWVuZG9iag0gICAgICAgICAgICAg
ICAgICAgDQp4cmVmDQo5IDIyDQowMDAwMDAwMDE2IDAwMDAwIG4NCjAwMDAwMDA5NDYgMDAw
MDAgbg0KMDAwMDAwMTAyMyAwMDAwMCBuDQowMDAwMDAxMTUxIDAwMDAwIG4NCjAwMDAwMDEz
MDUgMDAwMDAgbg0KMDAwMDAwMTcxMCAwMDAwMCBuDQowMDAwMDAyMjE3IDAwMDAwIG4NCjAw
MDAwMDI2NzEgMDAwMDAgbg0KMDAwMDAwMjgwMSAwMDAwMCBuDQowMDAwMDAzMDIyIDAwMDAw
But I can not view it in the web client. When I check the users who the emails were sent from, the download links appear just fine.
This seems similar to this post
Attachments do not display
Thoughts?