FishEye shows file changes when interpolated SVN keywords are changed by the VCS. For example; in FishEye:

From https://svn.atlassian.com/atlaseye/changelog/atlassian/?cs=94876
Whereas, SVN doesn't show these as changes between the revisions:
pdzwart@Fosters:~/Source/Idea/JQLRS/src/main/java/com/atlassian/qa[13:32:16](0,0)$ svn diff -r 94867 JIRABackupParser.java
Index: JIRABackupParser.java
===================================================================
--- JIRABackupParser.java (revision 94867)
+++ JIRABackupParser.java (working copy)
@@ -21,12 +21,12 @@
public class JIRABackupParser {
private static boolean VALIDATING = false;
private static String ISSUE = "Issue";
- private static String KEY = "Key";
+ private static String KEY = "key";
private Document document;
private String fileName;
- HashMap<String, Node> issues;
+ private HashMap<String, Node> issues;
public JIRABackupParser(String fileName) {
document = null;
I suggest that if the SVN property keywords is set and has any keyword values in it; that these keywords not be considered as differences between revisions.