editproduct.tmpl missing </form> tag - causes vbulletin style issue when editing ads
The file templates/vb3enhanced/editproduct.tmpl is missing an end-form tag </form>. In addition to causing the page to generate invalid html, leaving the form open causes the vBulletin style picker dropdown selection in the page footer to be included in the ppc edit form. One negative result of this is that anytime anyone edits an ad, they get a styleid cookie that forces their site-wide vbulletin style to be set to whatever style ppc is using at the time they edit the ad, thus overriding any forum-specific styles throughout the vbulletin system.
Adding a </form> tag near the end of the editproduct template resolves the issue.