Seb, in any application with GTK printing dialog try to print with a custom paper size:
Run the command
cupsctl LogLevel=debug
File/Print, in dialog select printer on "General" tab, switch to "Page Setup" tab, click on paper size drop down and choose "Manage Custom Sizes ...". Create a custom paper size. Now choose the newly created custom size and print.
In /var/log/cups/error_log You will find a line like
Seb, in any application with GTK printing dialog try to print with a custom paper size:
Run the command
cupsctl LogLevel=debug
File/Print, in dialog select printer on "General" tab, switch to "Page Setup" tab, click on paper size drop down and choose "Manage Custom Sizes ...". Create a custom paper size. Now choose the newly created custom size and print.
In /var/log/ cups/error_ log You will find a line like
D [13/Jul/ 2012:19: 24:49 +0200] [Job 626] argv[5] ="InputSlot= Default PageSize= Custom. Custom. 595.28x841. 89 Duplex=None PrintoutMode=Normal PrinterResoluti on=FromPrintout Mode number-up=1 job-uuid= urn:uuid: bd2f3351- a345-3abb- 63d9-ea13d11a8f 39 job-originating -host-name= localhost time-at- creation= 1342200218 time-at- processing= 1342200289"
Note the "PageSize= Custom. Custom. 595.28x841. 89" in the line.
For some programs (like Firefox for some users) it can even happen with regular paper sizes, but with custom sizes it occurs for sure.
I have tested with Thunderbird on up-to-date Precise now and reproduced it as described above.