Error messages when saving a node with uploaded file attachments

First, thanks for all your work for the community, Node Hierarchy's a very valuable tool.

Although I've created most of the content for my site using NH, I only recently started using core Upload module to attach files, and as soon as I did I started getting the below error messages right after I press Submit for a node with attachments, whether a new item or edited. I hadn't use NH in relation to these nodes, they're just "behind the scene" containers for files at the moment and the nodes probably won't ever be viewed by visitors directly. Also note the errors go away on refresh, and in looking at the database, everything seems (from my limited knowledge POV) to be OK, and so far no functional problems either.

It took a while for me to isolate Node Hierarchy as the culprit - or rather, the error messages stop when it's disabled.

I do like its functionality, so I'll try to make time to find out specifically what other module it might be conflicting with, or if it even actually matters to the end result (I'm going to be the only user uploading files for the moment) but in the meantime here's the test of the errors just in case something looks obvious.

I hate to try the dev version, as it's for a (soon to be) production site, unless you both think it will solve the problem AND let me know it's unlikely to cause problems.

Thanks in advance

* warning: Invalid argument supplied for foreach() in X:\xampp\drupal510\modules\node\node.module on line 561.

* warning: implode() [function.implode]: Invalid arguments passed in X:\xampp\drupal510\modules\node\node.module on line 565.

* user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 query: SELECT n.nid, n.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.sticky, r.timestamp AS revision_timestamp, r.title, r.body, r.teaser, r.log, r.format, u.uid, u.name, u.picture, u.data FROM shared_node n INNER JOIN shared_users u ON u.uid = n.uid INNER JOIN shared_node_revisions r ON r.vid = n.vid WHERE in X:\xampp\drupal510\includes\database.mysql.inc on line 172.

Here's a dump of my installed modules list:

Drupal 5.10
Includes: Upload, System, Filter, Node, Help, Block, Contact, Path, Watchdog, Menu, Search, Taxonomy, User

Drupal Administration Menu 5.x-2.6
Includes: Administration Menu

Administration Menu Dropdown 5.x-1.5
Includes: Administration Menu Dropdown

Devel 5.x-0.4
Includes: Devel

Image 5.x-2.x-dev (2008-Aug-17)
Includes: Image Attach, Image Import, Image

ImageAPI 5.x-1.2
Includes: ImageAPI, ImageAPI GD2

ImageCache 5.x-2.x-dev (2008-Jul-24)
Includes: ImageCache, ImageCache 4 Image, Imagecache UI

Image Assist 5.x-1.6
Includes: Image assist

Menu Trim 5.x-1.0
Includes: Menu Trim

Node Hierarchy 5.x-1.1
Includes: Node Hierarchy

Path Redirect 5.x-1.2
Includes: Path Redirect

Pathauto 5.x-2.3
Includes: Pathauto

Taxonomy context 5.x-1.0
Includes: Taxonomy context

Taxonomy Multi Editor 5.x-1.0
Includes: Taxonomy Multi Editor

Taxonomy Node Operations 5.x-1.1
Includes: Taxonomy Node Operations

Theme Settings API 5.x-2.8
Includes: Theme Settings API

Token 5.x-1.11
Includes: Token

Update Status 5.x-2.3
Includes: Update status

Upload previews 5.x-1.2
Includes: Upload preview

Upload path 5.x-1.1
Includes: Upload path

Views 5.x-1.6