Receiving this error once I did the SVN update and tried going into my admin control panel:
Notice: Use of undefined constant TABLE_PREFIX - assumed 'TABLE_PREFIX' in /home/andrewjs/public_html/gallery/plog-load_config.php on line 17 Table 'andrewjs_Gallery.TABLE_PREFIXconfig' doesn't exist
Did you update all the files from the SVN version? The reason I ask is the SVN constant changed from TABLE_PREFIX to PLOGGER_TABLE_PREFIX in order to work with other scripts that may already define the TABLE_PREFIX constant within their own code. This way we don't have conflicts.
Also, the plog-load_config.php file was renamed to plog-load-config.php (no underscore). Did you run the plog-admin/_upgrade.php file after you uploaded the SVN files to the server (per the README instructions)?