Reply To: IE crashes on buddypress pages
WP 3.4.2 – Buddypress 1.6.2
BP 1.6.2 was released for compatibility with WP 3.5 and some bug fixes. Have you tried to upgrade to WP 3.5 (backup DB and server files first, of course)?
Which IE version? Have you checked your server error log Or asked webhost tech support about it?
Also, Custom Community theme has recently been upgraded https://github.com/Themekraft/Custom-Community for WP 3.5/BP 1.6.2 compatibility. Have you upgraded the theme?