The DSpace 5.8 bug-fix release resolved a bug introduced in DSpace 5.7 that affected the ImageMagick thumbnail generation process.
For a list of all specific fixes, also refer to:
https://wiki.duraspace.org/display/DSDOC5x/Release+Notes#ReleaseNotes-5.8ReleaseNotes
Documentation is available at https://wiki.duraspace.org/display/DSDOC5x/
NOTE: If you plan to customize or modify DSpace, we recommend downloading the Source Release (-src-release.*). The smaller Release (-release.*) downloads only include the precompiled binaries.