Users can't open the shared directory, it would just reload the page. Here are some of the logs I captured in case it helps.
PHP Warning: fopen(/export/owncloud_data/<USERNAME>/files/Shared): failed to open stream: No such file or directory in /export/owncloud/lib/filestorage/local.php on line 112, referer: https://files.domain.tld/index.php
PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 5 database is locked' in /export/owncloud/lib/db.php:736\nStack trace:\n#0 /export/owncloud/lib/db.php(736): PDOStatement->execute(Array)\n#1 /export/owncloud/lib/appconfig.php(95): PDOStatementWrapper->execute(Array)\n#2 /export/owncloud/remote.php(14): OC_Appconfig::getValue('core', 'remote_webdav')\n#3 {main}\n thrown in /export/owncloud/lib/db.php on line 736
[Wed Oct 24 09:23:20 2012] [error] [client 10.10.20.86] DB error: DB Error: "SQLSTATE[HY000]: General error: 5 database is locked"<br />Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br />
[Wed Oct 24 09:23:20 2012] [error] [client 10.10.20.10] DB error: DB Error: "SQLSTATE[HY000]: General error: 5 database is locked"<br />Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br />
{"app":"core","message":"Failed to get existing database structure for upgrading (MDB2 Error: unknown error, _doQuery: [Error message: Could not execute statement]\n[Last executed query: SELECT name FROM sqlite_master WHERE type='table' AND sql NOT NULL AND name!='sqlite_sequence' ORDER BY name]\n[Native code: 5]\n[Native message: database is locked]\n)","level":4,"time":1351094170}
{"app":"core","message":"App \"ownCloud Instance Migration\" (admin_migrate) can't be used because it is not compatible with this version of ownCloud","level":3,"time":1351094180}
{"app":"user_ldap","message":"Bind failed: 49: Invalid credentials","level":3,"time":1351094507}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094771}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094824}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094827}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094831}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094894}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094905}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094955}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094956}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351094957}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351095579}
{"app":"core","message":"DB Error: \"SQLSTATE[HY000]: General error: 5 database is locked\"<br \/>Offending command was: SELECT "configvalue" FROM "oc_appconfig" WHERE "appid" = ? AND "configkey" = ?<br \/>","level":4,"time":1351095608}