Cover thumbnail issues
I designed my cover in Powerpoint, saved it as a pdf, and uploaded to Lulu. It looks great. But then when I saw the thumbnail of the cover on the product page, there are extraneous lines connecting some of the letters. Appears to have something to do withe the "wordart" font I used in Powerpoint. But this only appears in the thumbnail not on the actual cover!
Any ideas (other than ditching the wordart)?
Thanks for your help.