584940 - Seemingly at random, when I switch to a tab all the text has turned into squares.

Status: UNCONFIRMED

(Firefox :: General, defect)

Description

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User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8
Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8

It happens seemingly at random. I'll switch to a tab and see part of the page's text has turned into the squares then I'll tab over and tab back and the entire page's text is squares. It's happened often enough to bug (lol) me enough to file this report.

Reproducible: Sometimes

Steps to Reproduce:
I cannot say, I'm sorry.
Actual Results:  
http://cl.ly/7102e28e044d83bd7401

Expected Results:  
Rendered the page's text. That screenshot is from a forum post. Restarting fixes the issue.

Build platform
target
powerpc-apple-darwin9.2.0

Build tools
Compiler 	Version 	Compiler flags
gcc-4.0 -arch ppc 	gcc version 4.0.1 (Apple Inc. build 5484) 	-I/usr/X11/include -Wall -W -Wno-unused -Wpointer-arith -Wcast-align -W -Wno-long-long -gdwarf-2 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -fno-strict-aliasing -fpascal-strings -fno-common -pthread -DNO_X11 -DNDEBUG -DTRIMMED -O3
g++-4.0 -arch ppc 	gcc version 4.0.1 (Apple Inc. build 5484) 	-I/usr/X11/include -fno-rtti -fno-exceptions -Wall -Wpointer-arith -Woverloaded-virtual -Wsynth -Wno-ctor-dtor-privacy -Wno-non-virtual-dtor -Wcast-align -Wno-invalid-offsetof -Wno-long-long -gdwarf-2 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -fno-strict-aliasing -fpascal-strings -fno-common -fshort-wchar -pthread -DNO_X11 -DNDEBUG -DTRIMMED -O3

Configure arguments
--target=powerpc-apple-darwin9.2.0 --with-macos-sdk=/Developer/SDKs/MacOSX10.4u.sdk --enable-application=browser --enable-update-channel=release --enable-update-packaging --enable-tests --enable-official-branding
Source

Built from http://hg.mozilla.org/releases/mozilla-1.9.2/rev/a93100d87cc9
Build platform
target
i386-apple-darwin9.2.0

Build tools
Compiler 	Version 	Compiler flags
gcc-4.0 -arch i386 	gcc version 4.0.1 (Apple Inc. build 5484) 	-I/usr/X11/include -Wall -W -Wno-unused -Wpointer-arith -Wcast-align -W -Wno-long-long -gdwarf-2 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -fno-strict-aliasing -fpascal-strings -fno-common -pthread -DNO_X11 -DNDEBUG -DTRIMMED -O3
g++-4.0 -arch i386 	gcc version 4.0.1 (Apple Inc. build 5484) 	-I/usr/X11/include -fno-rtti -fno-exceptions -Wall -Wpointer-arith -Woverloaded-virtual -Wsynth -Wno-ctor-dtor-privacy -Wno-non-virtual-dtor -Wcast-align -Wno-invalid-offsetof -Wno-long-long -gdwarf-2 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -fno-strict-aliasing -fpascal-strings -fno-common -fshort-wchar -pthread -DNO_X11 -DNDEBUG -DTRIMMED -O3

Configure arguments
--target=i386-apple-darwin9.2.0 --with-macos-sdk=/Developer/SDKs/MacOSX10.4u.sdk --enable-application=browser --enable-update-channel=release --enable-update-packaging --enable-tests --enable-official-branding