Spotting low dpi images, overprint, pantones etc..

Hello
I'm designing a flyer in Illustrator, wich I exported to PDF using flyer.be his printoptions.
When I upload the file to their server which has an auto checking service I'm told that some black text isn't in overprint, which might result into white lines, that some images are lower that 300dpi and that some spot colors are present.
Is there an easy way to find out what image, text etc is causing this problem?
I'm basicaly looking for a proofing tool which shows me the areas that might cause problems instead of clicking on everything hoping to spot it...
Thanks in advance for the help!
Cheers
Benny

Yes, preflight in Acrobat using the respective print specs as specified on their site.
Mylenium

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