photoresist?  just a guess.
           jk
> Hi all,
>
> My PCB fab knowledge is limited, and a very unusual defect was discovered
> (too late) in assembly. I'm wondering if anyone has seen something like
> this before, or has an idea what this could be. The blue color seems
> noteworthy to me. This is for IPC class III, space. I will return this to
> the fabricator, but I wanted to get educated in case there is a debate
> regarding the cause. Thanks for your help!
>
> Steve put the pictures here:
>
> http://stevezeva.homestead.com/Howards_Blob.jpg
>
> http://stevezeva.homestead.com/Howards_Blob_close.jpg
> Howard A. Watson
>
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