I can't seem to install any of the beta/nightly builds. This PHP error is logged and the setup process gets stuck in "About to create tables".

[Tue May 29 10:21:26.642575 2012] [:error] [pid 4408:tid 1244] [client 127.0.0.1:1979] PHP Fatal error: Call to undefined function db_close() in C:\\apache\\htdocs\\gallery\\zp-core\\functions-basic.php on line 1478

Any help would be appreciated.

Windows, Apache 2.4.2, PHP 5.4.3 and MySQL 5.5.24.

Thanks!

Any way you can get a full stack trace on that error? It should not (in theory) happen. It indicates that the database scripts are not loaded, but it would be impossible for that to be the case if setup is about to create the DB tables.

all the tables show up in the database so I'm not sure where it hangs. How can I get the full stack trace error? The only error that shows up in the apache server log is that one.

Full stack traces are typically done by PHP settings. For my local install I set Xdebug remote-deug.

If that does not help, you can always put some code into the function that is calling db_close()

Just before line 1478 in functions-basic.php insert:
if (!function_exists('db_close')) { debugLogBacktrace('caught the culprit'); }
This will put a stack trace into you debug log.