If you are trying to use the svn log command and the output is missing the author and date fields like the following example:
More than likely your Anonymous Access is set to Read.
- Change this to None to prevent this problem.
- If you are using a client like TortoiseSVN you may need to clear any cached logs.
- In TortoiseSVN go to the settings screen and look for the Cached Repositories node. Then select and delete the repository you just fixed.