Forms 9 and JVM hangs when scrolling

Hello!
i have a big problem with forms 9.0.4 on windows.
In my form i use multirecord-blocks or lovs with many records e.g. 500 or 1000.
If the user scrolls down in any way (mouse or keyboard), forms and the jvm completly hangs.
Even the Java-Console does not respond anymore.
The only thing that is moving on the screen is the little slider in the forms status-bar.
Try to close the browser-window does not function, the browser-task must be dropped in the taskmanager.
It happens not always but very, very often.
It seems, the Jinitiator is a little more tough with this than the Sun JVM.
And it seems, that the slower the netword the most it's happen (but this is a supposition).
i think it is a synchronization problem of local temporary files.
i try to disable recordbuffering in formsweb.cfg but it does not help.
Today i have built a form with one multirecord-block on sys.dba_tab_columns for testing.
Query executed, scrolled down. About 15600 records. No problem.
i've built a lov on the same table. List values, scrolldown. No problem.
i start the form again, query, scroll down. Everything hangs.
sometimes, but really very rare, the apllication comes back to live after 1 or 2 minutes.
could somebody help me?

There was a bug which sounds similar to this problem (3421989) - I'd strongly recommend upgrading to 10gR2 at least anyway - and for this issue, I'd try a test case in 10gR2 to see if its fixed (apply the latest patch as well). Do you have a visual attribute on the current record??
Regards
Grant

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