Trying to open or import or drop a png graphic I got this error with
5878.

13 April 2004 11:54:26 am

VM: Win32 - a SmalltalkImage
Image: Squeak3.7beta [latest update: #5878]

SecurityManager state:
Restricted: false
FileAccess: true
SocketAccess: true
Working Dir P:\3.7Beta
Trusted Dir P:\3.7Beta\assray01
Untrusted Dir C:\My Squeak\assray01

UndefinedObject(Object)>>doesNotUnderstand: #bitAnd:
	Receiver: nil
	Arguments and temporary variables: 
		aMessage: 	bitAnd: 65535
	Receiver's instance variables: 
nil

ZLibWriteStream class>>updateAdler32:from:to:in:
	Receiver: ZLibWriteStream
	Arguments and temporary variables: 
		adler: 	nil
		start: 	1
		stop: 	65307
		aCollection: 	a ByteArray(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0...etc...
		s1: 	nil
		s2: 	nil
		n: 	nil
		b: 	nil
	Receiver's instance variables: 
		superclass: 	ZipWriteStream
		methodDict: 	a MethodDictionary(#on:->a CompiledMethod (992)
#updateCrc:from:to:...etc...
		format: 	168
		instanceVariables: 	nil
		organization: 	('initialize-release' on: updateCrc:from:to:in:
writeFooter write...etc...
		subclasses: 	nil
		name: 	#ZLibWriteStream
		classPool: 	nil
		sharedPools: 	nil
		environment: 	a SystemDictionary(lots of globals)
		category: 	nil

ZLibReadStream>>updateCrc:from:to:in:
	Receiver: <<error during printing>>
	Arguments and temporary variables: 
		oldCrc: 	nil
		start: 	1
		stop: 	65307
		aCollection: 	a ByteArray(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0...etc...
	Receiver's instance variables: 
		collection: 	a ByteArray(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0...etc...
		position: 	32768
		readLimit: 	65498
		state: 	12
		bitBuf: 	3
		bitPos: 	3
		source: 	a ByteArray(120 156 236 221 191 203 60 201 159 24 246 158 47
235 200 129 16 142 78 137 191 172 12 78 207 172 28 63 35 184 68 96 208
129 225...etc...
		sourcePos: 	2230
		sourceLimit: 	22821
		litTable: 	a WordArray(16777218 65794 67108868 131089 16777242 393443
16777250 196635 16777246 16777238 33554472 196627 16777244 16777236
33554468 262179 16777248 16777240 50331694 0 192 65542 65545 131083
131087 196631 196639 262187 262195 262203 327747 327763 327779 327795
393347 1 127 64 128 255 393411 393379 16777260 63 129 193 33554492
16777270 50331718 131085 33554496 33554488 83886174 65543 65544 4 51 34
102 103 154 153 205 222 65546 224 16777284 2 32 160 16777300 16777296
16777304 16777294 16777302 16777298 33554522 25 48 68 80 86 96 97 144
166 204 221...etc...
		distTable: 	a WordArray(16777218 1 50331652 658433 16777234 16777230
33554458 16777228 33554454 16777232 33554462 262177 327745 327777 393345
459009 657409 794625 16777236 196625 262193 393409 524801 459137 525057
590849 724993 591361 727041 798721 16777252 16777250 16777254 65541
131081 131085 868353 876545 16777256 196633 16777258 3 65543)...etc...
		sourceStream: 	nil
		crc: 	nil
		adler32: 	1

ZLibReadStream(InflateStream)>>pastEndRead
	Receiver: <<error during printing>>
	Arguments and temporary variables: 
		blockType: 	2
		bp: 	29
		oldLimit: 	0
	Receiver's instance variables: 
		collection: 	a ByteArray(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0...etc...
		position: 	32768
		readLimit: 	65289
		state: 	12
		bitBuf: 	0
		bitPos: 	5
		source: 	a ByteArray(120 156 236 221 191 203 60 201 159 24 246 158 47
235 200 129 16 142 78 137 191 172 12 78 207 172 28 63 35 184 68 96 208
129 225...etc...
		sourcePos: 	2761
		sourceLimit: 	22821
		litTable: 	a WordArray(16777218 65794 67108868 131089 16777242 393443
16777250 196635 16777246 16777238 33554472 196627 16777244 16777236
33554468 262179 16777248 16777240 50331694 0 192 65542 65545 131083
131087 196631 196639 262187 262195 262203 327747 327763 327779 327795
393347 1 127 64 128 255 393411 393379 16777260 63 129 193 33554492
16777270 50331718 131085 33554496 33554488 83886174 65543 65544 4 51 34
102 103 154 153 205 222 65546 224 16777284 2 32 160 16777300 16777296
16777304 16777294 16777302 16777298 33554522 25 48 68 80 86 96 97 144
166 204 221...etc...
		distTable: 	a WordArray(16777218 1 50331652 658433 16777234 16777230
33554458 16777228 33554454 16777232 33554462 262177 327745 327777 393345
459009 657409 794625 16777236 196625 262193 393409 524801 459137 525057
590849 724993 591361 727041 798721 16777252 16777250 16777254 65541
131081 131085 868353 876545 16777256 196633 16777258 3 65543)...etc...
		sourceStream: 	nil
		crc: 	nil
		adler32: 	1


--- The full stack ---
UndefinedObject(Object)>>doesNotUnderstand: #bitAnd:
...etc...