Levente Uzonyi uploaded a new version of UpdateStream to project The Trunk:
http://source.squeak.org/trunk/UpdateStream-ul.5.mcz

==================== Summary ====================

Name: UpdateStream-ul.5
Author: ul
Time: 14 August 2015, 7:51:22.944 pm
UUID: e4d793e4-bd54-4ca3-a232-998259a83102
Ancestors: UpdateStream-nice.4

#includesSubString: -> #includesSubstring:

=============== Diff against UpdateStream-nice.4 ===============

Item was changed:
  ----- Method: UpdateStreamDownloader class>>retrieveUrls:ontoQueue:withWaitSema: (in category 'fetching updates') -----
  retrieveUrls: urls ontoQueue: queue withWaitSema: waitSema 
  	"download the given list of URLs. The queue will be loaded alternately  
  	with url's and with the retrieved contents. If a download fails, the  
  	contents will be #failed. If all goes well, a special pair with an empty  
  	URL and the contents #finished will be put on the queue. waitSema is  
  	waited on every time before a new document is downloaded; this keeps 
  	the downloader from getting too far  ahead of the main process"
  	"kill the existing downloader if there is one"
  	| updateCounter |
  	UpdateDownloader
  		ifNotNil: [UpdateDownloader terminate].
  	updateCounter := 0.
  	"fork a new downloading process"
  	UpdateDownloader := [
  		'Downloading updates' displayProgressFrom: 0 to: urls size during: [:bar |
  			urls
  				do: [:url | | front canPeek doc | 
  					waitSema wait.
  					queue nextPut: url.
  					doc := HTTPClient httpGet: url.
  					doc isString
  						ifTrue: [queue nextPut: #failed.
  							UpdateDownloader := nil.
  							Processor activeProcess terminate]
  						ifFalse: [canPeek := 120 min: doc size.
  							front := doc next: canPeek.  doc skip: -1 * canPeek.
  							(front beginsWith: '<!!DOCTYPE') ifTrue: [
+ 								(front includesSubstring: 'Not Found') ifTrue: [
- 								(front includesSubString: 'Not Found') ifTrue: [
  									queue nextPut: #failed.
  									UpdateDownloader := nil.
  									Processor activeProcess terminate]]].
  						UpdateDownloader ifNotNil: [queue nextPut: doc. updateCounter := updateCounter + 1. bar value: updateCounter]]].
  			queue nextPut: ''.
  			queue nextPut: #finished.
  			UpdateDownloader := nil] newProcess.
  	UpdateDownloader priority: Processor userInterruptPriority.
  	"start the process running"
  	UpdateDownloader resume!