What's wrong with this PDF? And how to get more Info?

Hi,

i created an example simple PDF that Acrobat Reader tells me is defect but can be repaired.

Is there a way to ask Acrobat Reader for more information?

Thanks for any hints,

Torsten.

Here's how it looks:

---------------

%PDF-1.7
1 0 obj
<</Type /Catalog
/Pages 2 0 R
>>

endobj
2 0 obj
<</Count 1
/Kids [3 0 R
]

>>

endobj
3 0 obj
<</Content <<>>

/Parent 2 0 R
/Contents [4 0 R
]

/MediaBox [0
0
595
842
]

>>

endobj
4 0 obj
<</Length 43
>>
stream
0.8 w
0.8 0.0 0.0 rg
20 600 50 50 re
S

endstream

endobj

xref
0 5
0000000000 65535 f
0000000009 00000 t
0000000058 00000 t
0000000104 00000 t
0000000200 00000 t

trailer
<</Root 1 0 R
/Size 5
>>

startxref
293
%%EOF