gvim has messed up global menus

See the attached screenshot. On the console (I don't see these on non-unity), I get a *lot* of criticals about GVariants:

(gvim:30210): GLib-CRITICAL **: g_variant_new_string: assertion 'g_utf8_validate (string, -1, NULL)' failed

(gvim:30210): GLib-CRITICAL **: g_variant_ref_sink: assertion 'value != NULL' failed

(gvim:30210): GLib-CRITICAL **: g_variant_ref: assertion 'value != NULL' failed

(gvim:30210): GLib-CRITICAL **: g_variant_ref: assertion 'value != NULL' failed

(gvim:30210): GLib-CRITICAL **: g_variant_new_variant: assertion 'value != NULL' failed

(gvim:30210): GLib-CRITICAL **: g_variant_get_type: assertion 'value != NULL' failed

(gvim:30210): GLib-CRITICAL **: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed

(gvim:30210): GLib-CRITICAL **: g_variant_builder_add_value: assertion '!GVSB(builder)->expected_type || g_variant_is_of_type (value, GVSB(builder)->expected_type)' failed

(gvim:30210): GLib-CRITICAL **: g_variant_builder_end: assertion 'GVSB(builder)->offset >= GVSB(builder)->min_items' failed

etc

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity-gtk2-module 0.0.0+14.04.20140319-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
Uname: Linux 3.13.0-18-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Mar 20 13:06:47 2014
InstallationDate: Installed on 2012-10-07 (528 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20121007)
SourcePackage: unity-gtk-module
UpgradeStatus: Upgraded to trusty on 2013-05-07 (317 days ago)