I've bumped pidgin.spec in trunk (Vermillion, 2.23) to 2.4.3. You will see it next week in Vermillion build 95.
This issue likely also exists in snv_92+ as it has 2.4.2. I will file a bug. sxce-snv_91 uses Pidgin 2.1.1. After reading the background to the issue I'm surprised that it works. This message posted from opensolaris.org
