Having moved from Mac OS X 10.5 (Leopard) to Mac OS X 10.6 (Snow Leopard), the Subversion integration into MyEclipse IDE 7.5 using Subeclipse did not work any more. More precisely, when opening the repository item in the SVN Repositories view, I got the dialog
and an error message in the console saying
After trying to remove and reinstall the Subeclipse plugin without any improvement, I found a solution solving my problem after installing and using the JDK Version 1.5. For a detailed description look here: Snow Leopard and MyEclipse Fix Resolution and here http://wiki.oneswarm.org/index.php/OS_X_10.6_Snow_Leopard.
After installing the JDK 1.5, just move the J2SE 5.0 32-bit in front of the Java SE 6 32-bit within the Java Preferences utility. The 64-bit JDKs are not taken into account (yet) and can be left even on top of the 32-bit JDKs.
If you use the encryption API of Java, make sure you download and install the Unlimited Strength Jurisdiction Policy Files in the appropriate directory:
Otherwise you might get errors like
java.security.InvalidKeyException: Illegal key size or default parameters