I'm having this same problem on Windows 7 Ultimate 64 with an ATI Mobility Radeon HD3470

What exactly do you mean by freeze - does it just stop responding to input? Or actually crash?

Doesn't happen here on OS X, rev. 28523, so might need a windows dev to confirm/test here.

It stops responding to input.

Ok - also, is this one that you built yourself? Or perhaps a specific build from online (graphicall etc?)

The revs I mentioned were BF builds on Grahicall.

Same problem on Windows Vista 64 bit with graphicall r28858.
I check the process with task manager and it use not CPU and memory is stable.
Description:
A problem caused this program to stop interacting with Windows.

Problem signature:
Problem Event Name: AppHangB1
Application Name: blender.exe
Application Version: 0.0.0.0
Application Timestamp: 4bdc2cef
Hang Signature: c847
Hang Type: 0
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 4105
Additional Hang Signature 1: b2d2f7ec2af7f2225d0872440fde753e
Additional Hang Signature 2: 08eb
Additional Hang Signature 3: 138219a7d585df0bb1da83da9068aa28
Additional Hang Signature 4: c847
Additional Hang Signature 5: b2d2f7ec2af7f2225d0872440fde753e
Additional Hang Signature 6: 08eb
Additional Hang Signature 7: 138219a7d585df0bb1da83da9068aa28

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Just hit F12 to render the default scene.

Hope this help

I forgot to say that on Ubuntu 9.10 64 bit this problem don't happens

Hi, just checking up - is this problem still happening on up-to-date SVN builds?

I can confirm that as of rev 28861 it I can render the default scene without problems in full screen and new window. I'd say it's fixed. Thanks!!!!

Excellent, I'll close this then.

Thanks