iframe threat

I need help in determining whether the site at www.ibys.org has been infected with an iframe threat. A large number of apparently computer-generated posts have recently appeared on the forum ‘Show and tell sheds’. I have deleted them, but suspect there may be damage. Can anybody assist? Cheers, Julia

Bad Stuff detektor reports for this site, please make site non-clickable like hxxp://etc:
No zeroiframes detected!
Check took 5.73 seconds

(Level: 0) Url checked:
hxtp://www.ibys.org/
Zeroiframes detected on this site: 0
No ad codes identified

(Level: 1) Url checked: (script source)
hxtp://www.ibys.org/shed/wp-content/plugins/nextgen-gallery/js/swfobject.js?ver=1.5
Zeroiframes detected on this site: 0
No ad codes identified

(Level: 1) Url checked: (script source)
hxtp://www.ibys.org/shed/wp-content/plugins/lightbox/prototype.js
Zeroiframes detected on this site: 0
No ad codes identified

(Level: 1) Url checked: (script source)
hxtp://www.ibys.org/shed/wp-content/plugins/lightbox/scriptaculous.js?load=effects
Zeroiframes detected on this site: 0
No ad codes identified Blank page, could not connect, so here it apparently was!

(Level: 2) Url checked: (script source)
hxtp://www.ibys.org/shed/wp-content/plugins/lightbox/+libraryname+
Blank page / could not connect
No ad codes identified

(Level: 1) Url checked: (script source)
hxtp://www.ibys.org/shed/wp-content/plugins/lightbox/lightbox.js
Zeroiframes detected on this site: 0
No ad codes identified

(Level: 1) Url checked: (script source)
hxtp://www.ibys.org/shed/wp-content/plugins/yak/yak.js
Zeroiframes detected on this site: 0
No ad codes identified

(Level: 1) Url checked: (script source)
hxtp://www.ibys.org/shed/wp-includes/js/jquery/jquery.js?ver=1.1.4
Zeroiframes detected on this site: 0
No ad codes identified

Exploit Labs Link Scanner gives an all green there. WOT does not protest either,

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