I took the liberty in updating getFlash11.tcz to support both OSS and alsa-pulseaudio, I hope that's ok with everyone.
getFlash11 for tc-5.x x86 now includes both
libflashsupport.so (with OSS support) and
libflashsupport.so (compiled for alsa and pulseaudio support).
After installing the Sound modules with support for your system then run getFlash11, a flash11.tcz extension is created with support for the currently installed sound modules. If changing sound modules eg: from OSS to the latest Alsa+Pulseaudio simply re-run getFlash again and reboot.
tested in chromium-browser, firefox-official_v32 and firefox_v21 all use OSS or alsa or alsa+pulseaudio with Flash11
will submit asap