Some photo thumbnails don't load

I'm running on a MacBook Pro with OS X 10.5.5 and Safari. While viewing photos some of the thumbnails don't load and are shown as a small questions mark (error loading)? Is this a known issue?

Apparently these are the errors in the logs when the thumbnails don't display... Is there some way to increase the default heap size for the local server component? Does this problem affect the ReadyNAS version of the software as well?

Code:

 ## Start Action Block : (Dec 3, 2008 5:58:46 PM) Record No:Web-Worker-Thread : 1385 ContinuedIn :  Context::Client Id [] Thread Name [Web-Worker-Thread : 1] Context [NOT_SET] uri []
 Main message  ID: WEB1100;Problem occured. Sending error page [null] for request [/photos/image/square_thumb/P8210056.JPG]. Actual Request [/photos/image/square_thumb/P8210056.JPG]Error Message [ Java heap space]. error Status [500]Info; Tip: 
 
   Messages Trace:
 	  Java heap space;(web.servlet.core.ErrorPageManagerImpl)
 	 WEB1100;   Problem occured. Sending error page [null] for request [/photos/image/square_thumb/P8210056.JPG]. Actual Request [/photos/image/square_thumb/P8210056.JPG]Error Message [ Java heap space]. error Status [500];Info;(web.servlet.core.ErrorPageManagerImpl)
  Exception Stacks: 
 [ Trace - 0 ]	CAUSE; Java heap space
 java.lang.OutOfMemoryError: Java heap space
 
   Event & Debug Traces..
 	E::Java heap space ::(web.servlet.core.ErrorPageManagerImpl)
 	E:roblem occured. Sending error page [null] for request [/photos/image/square_thumb/P8210056.JPG]. Actual Request [/photos/image/square_thumb/P8210056.JPG]Error Message [ Java heap space]. error Status [500] ::(web.servlet.core.ErrorPageManagerImpl)
 
 ## END Action Block : (Dec 3, 2008 5:58:46 PM) Record No:Web-Worker-Thread : 1385 Context ::Client Id [] Thread Name [Web-Worker-Thread : 1] Context [NOT_SET] uri []##

Hello,

Thank you for using Dekoh.

Yes, this is known issue with Dekoh Photos. ReadyNAS Photos does not have this problem.

-Prashant