I'm having similar trouble using the Tweak -> Shrink tool. I'm not
getting things disappearing, but the whole path gets gradually distorted
when using the tool on only a small portion of the path. Shouldn't the
parts of the path beyond the tweak brush be unaffected? Is this the same
bug or should I
Ping, since there's been no activity on this for a year.
I had the same issue (tablet pressure not responding despite having
configured it), and resolved it with the same workaround (export
LIBOVERLAY_SCROLLBAR=0).
I'm running Ubuntu 13.10. I tried both the Inkscape from the package
manager (Inks