cant see image attachment if login

[kimmchii]

if i login i cant see the image attachment, i get this:

Here is a screen shot:

*INCORRECT USE OF [attachthumb=#]. You need to specify the attachment number, for example [attachment 1 not found].

if i disable cookies or logout, then i can see, what's wrong?

thank you.

[mouser]

what page kimmchii?

[kimmchii]

any page that has images, for example this one:
Topic: Firefox Extensions: Your favorite or most useful

and it happens in all the browsers, IE, FF and Opera.

[mouser]

try now.

[kimmchii]

thank you, it's okay now.

[mouser]

ok, just a mess up with permissions.

[Cavalcader]

So as not to waste a good topic (or clutter with a new one): it looks like email notices of private messages have gotten munged lately. The special characters (ampersand, question mark, equals sign) are not getting through properly. If I click on the notice link, I get a complaint from the site, like this:

The requested URL /forum/index.php=3Faction=3Dpm;sa=3Dsend;f=3Dinbox;pmsg=3DXXXX;quote;u=3DXXXXX was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

(Where I inserted the capital "X" are places where it had user-specific info.) That ErrorDocument I can't help with but the URL is supposed to be: http://www.donationcoder.com/forum/index.php?action=pm&sa=send&f=inbox&pmsg=XXXX&quote&u=XXXXX

Any ideas on what's up?