Comment 2 for bug 727509

Unfortunately your backtrace doesn't tell where the error occurs in Inkscape (no debug symbols installed [1]), but from the information your provide, this is the same as bug #665316 “crash when saving after changing stroke width (no focus-out-event)”, which in turn is a duplicate of bug #669537.

Linking as duplicate to bug #669537 - please add a comment here and revert the duplicate status if you don't agree and think these are different issues, or if the same crash occurs with the bug-fix release 0.48.1.

[1] <https://wiki.ubuntu.com/Backtrace>