Yes, that's right, 2 new releases were done.
Basically, 1.3.24 fixes a major bug in Pydev, related to the debugger (it was halting on some cases and Jython was not working because a dependency on itertools was added).
I think that the major highlight in 1.3.23 is the possibility to debug multiple processes at the same time in the remote debugger (yes, it only supported one at a time), so, if you're spawning multiple processes, that should help a bit :)
Another fix was an incompatibility with the update manager of Eclipse 3.4... It should be backward compatible, but apparently, because the Pydev update site contained some really old versions, after installing Pydev, no other plugins could be installed! -- something related to getting the dependencies wrong in the new Eclipse update manager.
Aside from that, this release had lots of minor bugs fixed, so, upgrading is highly recommended!