I've looked some more into it and found what might be contributing to 
the problem. Internally, Remote Buddy knows press, repeat and release 
event. Right now, the "fastforward" Applescript command is executed on 
press & repeat, whereas executing it on press only should last. The 
problem here is that depending on context - in a DVD menu or playing a 
DVD movie - DVD Player has to be sent different commands for 
navigation and ff/rew respectively. I'm still unsure whether this 
really may contribute to the problem, since this AppleScript is in use 
pretty much since 2006 and I can't remember a previous occurence of 
the problem you describe.

Regardless, I'll optimize this code for the next release. Please let 
me know, if the problem still exists after the next release of Remote 
Buddy.

Best regards, 
Felix Schwarz