Okay, open the Transform Bug.blend file and you should see the sequencer, with a scene strip and a transform strip applied to it. Notice in the graph editor that the scale of the transform strip is animated (it only says x scale because I have Uniform Scale on, but the bug still happens without that enabled). Now play the animation and the image should transform (scale) at the proper moment. Now move the scene strip to the right, and scrub through/play the animation. The strip will scale, but it will 'lag', scaling later than it shows it should in the animation window. Even the transform strip's properties window shows the scale value going up in sync with the graph editor, yet the actual scaling of the scene is out of sync with the curve.

Note that while in this example, I am using as input the current scene, it also occurs if the scene input is not the current scene. Also, the problem does not occur if the strip that the transform is applied to is not a scene strip (I.E. image and movie strips work fine).

Blender info:
Blender:
============================================

version 2.55 (sub 0), revision 33274M. Release
build date: 2010-11-23, 22:34:10
platform: Windows:64bit
binary path: C:\Users\mardgase\DOWNLO~1\1626_B~1\BLENDE~1\blender.exe
build cflags: /nologo /Ob1 /J /W0 /Gd /we4013 /wd4018 /wd4244 /wd4305 /wd4800 /wd4065 /wd4267 -O2 -DNDEBUG -O2 -DNDEBUG -DWIN32 -D_CONSOLE -D_LIB -DFTGL_LIBRARY_STATIC -D_CRT_SECURE_NO_DEPRECATE
build cxxflags: /nologo /Ob1 /J /W0 /Gd /we4013 /wd4018 /wd4244 /wd4305 /wd4800 /wd4065 /wd4267 /EHsc -O2 -DNDEBUG -O2 -DNDEBUG -DWIN32 -D_CONSOLE -D_LIB -DFTGL_LIBRARY_STATIC -D_CRT_SECURE_NO_DEPRECATE
build linkflags: /SUBSYSTEM:CONSOLE /MACHINE:X64 /INCREMENTAL:NO /NODEFAULTLIB:msvcprt.lib /NODEFAULTLIB:msvcprtd.lib /NODEFAULTLIB:glut32.lib /NODEFAULTLIB:libc.lib /NODEFAULTLIB:libcd.lib /NODEFAULTLIB:libcpd.lib /NODEFAULTLIB:libcp.lib /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:msvcrtd.lib /NODEFAULTLIB:msvcmrt.lib /NODEFAULTLIB:msvcurt.lib
build system: SCons