webmail attachment error

[dc2698]

roundcubemail-0.1 stable is installed:

I have a webmail attachment error.  For example, if an email contains an image JPEG and a PDF attachment files.  When in the webmail I click to download these files, it just opens a page that shows a full page of garbage characters and no download has been initiated.

But.......in MS Outlook the attachment files are fine!  So I am sure that's the webmail problem alone.

I tried to look at the program\steps\mail\get.inc but found nothing wrong (or I may have missed something I don't know).

Please direct me to the right PHP file where I can fix this attachment error, or let me know the exact solution to my problem.

Thanks a bunch in advance!

A new Roundcubemail user.