Ah, the solutions could be endless.
First - are Opera and Java rated to actually work on you Palm device? You could be having memory or compatibility issues there. In addition, if they are memory hogs, you may have to shut down any background programs first.
Second, make sure the version of Java is what you need for the version of Opera (Java changes about every other week)
Finally, more useful information will be posted after this by other posters.
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anahl nathrak, uth vas bethude, doth yel dyenvey...