How many pecl packages have an different extension name from the package?

Hi, One of the additions to package2.xml makes it possible to depend on a PECL extension without it being loaded into memory. This is through the <providesextension> tag, which tells the installer what extension is in the package. One of the changes in PEAR 1.4.1 is that running "pear convert" no longer assumes that the extension is a lower-cased version of the package name, so that package "PDO" is assumed to bundle extension "PDO" instead of "pdo". As I recall, the "SQLite" package is the "sqlite" extension (correct me if I'm wrong). How many other packages are there whose package name/extension name differ in case or actual name? Greg