Changes in Pidgin 2.5.5:

libpurple:
* Fix a crash when removing an account with an unknown protocol id.
* Beta support for SSL connections for AIM and ICQ accounts. To
enable, check the "Use SSL" option from the Advanced tab when
editing your AIM or ICQ account. (Paul Aurich)
* Fix a memory leak in SILC. (Luke Petre)
* Fix some string handling in the SIMPLE prpl, which fixes some buddy name
handling and other issues. (Paul Aurich, Marcus Sundberg)
[...]