Issue: Cannot edit some pages

public static $version = '1.2.0';

public static $version = '1.2.0 RC 4';

public function compare($higher, $lower)
{
...
}

	public function compare($higher, $lower)
	{
		foreach (array(
			'high' => $higher,
			'low' => $lower
		) AS $key => $ver)
		{
			$ver = strtolower($ver);
			preg_match('/^(\w+\s+)?(\d+)\.(\d+)\.(\d+)(\s+(a|alpha|b|beta|g|gamma|rc|release candidate|gold|stable|final|pl|patch level|lite)(\s*(\d+)(\s+(pl|patch level)(\s*(\d+)))?)?)?$/siU', $ver, $regs);

			$value = $regs[2] * 100000;
			$value += $regs[3] * 10000;
			$value += $regs[4] * 1000;

			$co = 0;

			if (!empty($regs[6]))
			{
				switch ($regs[6])
				{
					case 'a':
					case 'alpha':
						$co = -750;
						break;

					case 'b':
					case 'beta':
						$co = -500;
						break;

					case 'g':
					case 'gamma':
						$co = -250;
						break;

					case 'rc':
					case 'release candidate':
						$co = -100;
						break;

					case 'patch level':
						$co = 1;
						break;

					case 'gold':
					case 'stable':
					case 'final':
					default:
						$co = 75;
						break;
				}
			}
			else
			{
				$co = 75;
			}

			$value += $co;

			if (!empty($regs[8]))
			{
				$value += $regs[8];
			}

			if (!empty($regs[10]))
			{
				$value += 1 + $regs[12];
			}

			${$key} = $value;
		}

		if ($high > $low)
		{
			return 1;
		}
		else if ($high < $low)
		{
			return -1;
		}

		return 0;
	}