Attempted to read or write protected memory

One of the packages we've created a while ago is now, suddenly, giving us a strange error:
There was an error displaying the layout.
Additional Information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. (msddsp)
When I click on the help icon, I get:
Event ID: DDSErrorDeserializeDiagram
Source: Microsoft.DataTransformationServices.Design.SR
I should note that I am using custom components, none of which have been changed since the last time this package worked.
When I click ok, all my components have the information icon. No names are displayed (although all are accessible from the properties window) ... When I double click them, I still get the custom UI for my component, and all the properties are there and correct.
Other packages using the same tools work fine.
Any ideas/suggestions?
Thanks,
Steve
I am having a similar problem - did anyone find a solution to this?

Attempted to read or write protected memory

One of the packages we've created a while ago is now, suddenly, giving us a strange error:
There was an error displaying the layout.
Additional Information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. (msddsp)
When I click on the help icon, I get:
Event ID: DDSErrorDeserializeDiagram
Source: Microsoft.DataTransformationServices.Design.SR
I should note that I am using custom components, none of which have been changed since the last time this package worked.
When I click ok, all my components have the information icon. No names are displayed (although all are accessible from the properties window) ... When I double click them, I still get the custom UI for my component, and all the properties are there and correct.
Other packages using the same tools work fine.
Any ideas/suggestions?
Thanks,
SteveI am having a similar problem - did anyone find a solution to this?