Problem Description
If there's Non-standard Character in Artifact definition's name, will fail Bamboo exports. This will happen if you check Export artifacts during export. The export will fail with the following error.

ERROR [http-bio-8085-exec-21] [Export] java.io.IOException: /usr/bamboo/51home/exports/export_atlassianbamboo_3901_2013t.zip/artifacts/TEST-TEST/JOB1/build-00003/汉字 (not a directory)
java.io.IOException: /usr/bamboo/51home/exports/export_atlassianbamboo_3901_2013t.zip/artifacts/TEST-TEST/JOB1/build-00003/汉字 (not a directory)
	at de.schlichtherle.truezip.file.TBIO.cp_r0(TBIO.java:158)
	at de.schlichtherle.truezip.file.TBIO.cp_r0(TBIO.java:169)
	...

Steps to replicate

1. Create and artifact's definition in one plan with Non-Standard character on the name. For example put it like 汉字.
2. Run the plan and make sure it's successful and the artifact exists.
3. Run the export of Bamboo backup and make sure Export artifacts is checked.