It's not a bug really. If program will scroll automatically to new packets, it will cause perfomance problem (if traffic is laerge). But I will probably include this as option.
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What decoding options do you miss? ASniffer has almost the same decoding capabilities as Iris. It decodes TCP/IP sessions. But write to me (I'm author of this program) with suggestions and good chances you will find them in the next version.
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