Here is a slice the corrects the bug.
I cannot commit to pharo inbox.

Usman


On Tue, Nov 5, 2013 at 11:49 AM, Usman Bhatti <usman.bhatti@gmail.com> wrote:
https://pharo.fogbugz.com/f/cases/12073/Writing-jpeg-files-to-disk


On Tue, Nov 5, 2013 at 11:34 AM, Usman Bhatti <usman.bhatti@gmail.com> wrote:
Hello,

Due to the changes in Pharo 3.0, I cannot write jpeg files on the disk. This happens because when writing a jpeg file, we delete any precedent version of the file to be exported. However, now DiskStore>>delete: throws an exception when the file to be deleted is not present

delete: path
| pathString encodedPathString |
(self exists: path)
ifFalse: [ ^ FileDoesNotExist signalWith: path ].
...

Hence, we need to fix PluginBasedJPEGReadWriter>>putForm: quality: progressiveJPEG: onFileNamed: to not delete files not present.

To reproduce the problem:
Display writeJPEGfileNamed: 'display.jpeg' progressive: true

If confirmed, I'll open a bug report and propose a slice because correction is quite simple ;)

regards,
Usman