Version:           1.3.0 (using KDE 3.2.3, compiled sources)
Compiler:          gcc version 3.3.3
OS:                Linux (i686) release 2.4.26

This time it is a little bit harder to crash Umbrello, but it works.

1. Load Umbrello
2. Change active language to Java and click for a new document
3. Change active language to PHP and click for a new document
4. Change active language to C++ and click for a new document
5. Go on changing the language till it crashes

backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x40be3995 in QObject::disconnectInternal () from /usr/lib/qt/lib/libqt-mt.so.3
(gdb) bt
#0  0x40be3995 in QObject::disconnectInternal ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#1  0x40be3728 in QObject::disconnect () from /usr/lib/qt/lib/libqt-mt.so.3
#2  0x08145a63 in OwnedCodeBlock::release (this=0x4101ce48) at qobject.h:240
#3  0x08146c13 in OwnedHierarchicalCodeBlock::release (this=0x8812ae8)
    at ownedhierarchicalcodeblock.cpp:48
#4  0x08119c79 in CodeGenObjectWithTextBlocks::resetTextBlocks (this=0x0)
    at codegenobjectwithtextblocks.cpp:345
#5  0x0812c354 in HierarchicalCodeBlock::release (this=0x858a418)
    at hierarchicalcodeblock.cpp:407
#6  0x08119c79 in CodeGenObjectWithTextBlocks::resetTextBlocks (this=0x85d65d8)
    at codegenobjectwithtextblocks.cpp:345
#7  0x08118d67 in ~CodeGenObjectWithTextBlocks (this=0x85d65d8)
    at codegenobjectwithtextblocks.cpp:33
#8  0x0811037c in ~CodeDocument (this=0x85d65b0) at qstring.h:848
#9  0x0810292a in ~ClassifierCodeDocument (this=0x85d65b0) at qptrlist.h:70
#10 0x082608a9 in ~CPPHeaderCodeDocument (this=0x85d65b0) at qstring.h:848
#11 0x08256e79 in ~CPPCodeGenerator (this=0x0) at cppcodegenerator.cpp:45
#12 0x08162392 in UMLDoc::removeCodeGenerator (this=0x843de00,
    remove_object=0x884e3c8) at umldoc.cpp:676
#13 0x081620e4 in UMLDoc::deleteContents (this=0x843de00) at qdict.h:111
#14 0x0815f6ab in UMLDoc::newDocument (this=0x843de00) at umldoc.cpp:220
#15 0x081581e8 in UMLApp::slotFileNew (this=0x83dca38) at uml.cpp:597