- If you don't have Quicktime 7.1.5 installed yet, do not install it.
- If you already did the installation, wait for the V2.5.3 which includes a temporary workaround for this QT version. It should be online tomorrow (14 march 07).
- If you cannot wait, try to downgrade, but it seems that it is a bit risky.
Hopefully Apple will fix the 7.1.5 problems in the near future (after all even World of Warcraft does not work on some configuration since this release, so they will have more pressure than usually
).
Yves.