When exporting a sequence to a quick time movie using [file, export, send to quicktime movie], the progress bar no longer moves or represents the progress of the export. Instead it just freezes; however the export still completes and creates a working file which conform to the settings specified in the options box.
I am having no issues with exporting to squeeze or anything else.
Specs:
MacBook Pro 2012 15" with i7 2.3 GHz
16GB RAM
128GB Samsung 840 Pro SSD & 500GB WD Blue HDD
Running OS X 10.9.1 & Media Composer 7.0.3