I just saw the issue again, but this time it happened right after an exception. 
I got an except. Hit back and then it complained that the link didn't exist.

D?

On Apr 24, 2010, at 6:58 PM, Douglas Ferguson wrote:

> Ah yes.. 
> 
> I am definitely seeing the "component not found on page" error.
> 
> Any tips on how to get a quick start for this? Anybody got any example 
> quickstarts that deal with back button issues?
> 
> D/
> 
> On Apr 24, 2010, at 6:41 PM, Igor Vaynberg wrote:
> 
>> then you would get a page-expired error
>> 
>> -igor
>> 
>> On Sat, Apr 24, 2010 at 3:34 PM, Douglas Ferguson
>> <doug...@douglasferguson.us> wrote:
>>> Well something is happening, because I see it in the production logs and 
>>> from time to time on my dev machine.
>>> 
>>> What if the server is restarted?
>>> 
>>> D/
>>> 
>>> On Apr 24, 2010, at 11:09 AM, Igor Vaynberg wrote:
>>> 
>>>> that doesnt matter because the url of the link you click contains the
>>>> version number of the page
>>>> 
>>>> -igor
>>>> 
>>>> On Sat, Apr 24, 2010 at 2:35 AM, Pointbreak
>>>> <pointbreak+wicketst...@ml1.net> wrote:
>>>>> In firefox it doesn't. Firefox reads the page back from it's in memory
>>>>> cache, which is the state before you clicked the ajax link. The headers
>>>>> should be changed to force firefox to request the page from the server
>>>>> (wicket). There are other threads on this subject, and frankly I do not
>>>>> understand why the headers are not changed in wicket core.
>>>>> 
>>>>> On Fri, 23 Apr 2010 21:45 -0700, "Igor Vaynberg"
>>>>> <igor.vaynb...@gmail.com> wrote:
>>>>>> the back button should roll the page back to the state that contained the
>>>>>> item
>>>>>> 
>>>>>> -igor
>>>>>> 
>>>>>> On Fri, Apr 23, 2010 at 9:28 PM, Douglas Ferguson
>>>>>> <doug...@douglasferguson.us> wrote:
>>>>>>> Could this possibly happen if the following occurred.
>>>>>>> 
>>>>>>> 1) Load a page with a repeater on it
>>>>>>> 2) Click on an ajax link that would remove an item from the repeater
>>>>>>> 3) Click the back button. Click on the link for the item you removed.
>>>>>>> 
>>>>>>> D/
>>>>>>> 
>>>>>>> 
>>>>>>> On Apr 23, 2010, at 10:32 AM, Martin Asenov wrote:
>>>>>>> 
>>>>>>>> Would someone assist me on this?
>>>>>>>> 
>>>>>>>> Thank you in advance!
>>>>>>>> 
>>>>>>>> -----Original Message-----
>>>>>>>> From: Martin Asenov [mailto:mase...@velti.com]
>>>>>>>> Sent: Friday, April 23, 2010 9:38 AM
>>>>>>>> To: users@wicket.apache.org
>>>>>>>> Subject: Back button
>>>>>>>> 
>>>>>>>> Hello, everyone!
>>>>>>>> 
>>>>>>>> I've got a page with a repeater with cells - every single cell has a 
>>>>>>>> link in it. However, when you go to another page and afterwards press 
>>>>>>>> the Back button and click one of the links, the following exc is 
>>>>>>>> thrown:
>>>>>>>> 
>>>>>>>> WicketMessage: org.apache.wicket.WicketRuntimeException: component 
>>>>>>>> view_holder:view:25:cols:30:trigger_ref not found on page 
>>>>>>>> com.company.project.ui.calendar.Calendar[id = 46], listener interface 
>>>>>>>> = [RequestListenerInterface name=IBehaviorListener, method=public 
>>>>>>>> abstract void org.apache.wicket.behavior.IBehaviorListener.onRequest()]
>>>>>>>> 
>>>>>>>> Wicket was supposed to support the Back button, wasn't it? Or maybe 
>>>>>>>> I'm missing something.
>>>>>>>> 
>>>>>>>> Please advice...
>>>>>>>> 
>>>>>>>> Thank you,
>>>>>>>> Martin
>>>>>>>> 
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