Can you try (after this blog post )
Window -> Preferences, Java -> Compiler -> Building. Under "Output folder" add ", '.svn/'" to "Filtered Resources" (so that you get "'*.launch, .svn/'").
The problem may be due to the fact that the Jar exporter includes the option:
"export generated class files and resources" ^^^^^^^^^

If you filter out these โresourcesโ ( .svn folders), most likely they will not be included in the final version of the Jar.
Vonc
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