It seems that there is an interaction between the new OpenSSL libraries, MDR protocol add-ons and the runtime loader. Here is how it happens: 1 - When you first create an account, it defaults to POP3 as the protocol. If you switch the protocol to IMAP, the preferences panel crashes (more about this below). 2 - If I change the email preferences to default to IMAP as the protocol, it does nto crash when switching to POP3 neither when switching back to POP3, but if I save the account as POP3 and close and reopen the preferences panel and try to switch to IMAP, it crashes. The crash mentioned happens because load_add_on() fails (with a General OS Error) when trying to load the IMAP add-on. Syslog just shows this: KERN: runtime_loader: Could not map image: Invalid Argument As seem above, this happens only if POP3 is loaded first (with load_add _on()) and then IMAP is loaded (also with load_add_on()). If the order is reversed, there is no crash. It also only happens with the most recent SSL version (not with the previous version). Any ideas? Ingo, any suggestions about trying to debug this at the runtime_loader level? -Bruno