change() function doesn't work as expected

[Leonidimus]

G'day!
In the manual it's written that change function "Returns difference between last and previous values". Unfortunately for me it's not like that due to unknown reason

Here is the glitchy trigger (There is no space in "change" word below, it's the forum engine who adds it):

[B]Name[/B]	PSTN channels are lost [{HOSTNAME}::TS1]
[B]Expession[/B] {jboss_cs_t:jmx_trunk_group_total_channels_ts1.change(0)}<0

Here is the extract from "Latest data":
---------------------------------------
somehost.company.com: Total channels on TS1
Timestamp Value
... ... ...
2007.Oct.04 07:45:16 392
2007.Oct.04 07:40:18 368
2007.Oct.04 07:37:11 392
2007.Oct.04 07:35:15 392
2007.Oct.04 07:31:18 392
2007.Oct.04 07:30:13 368
2007.Oct.04 07:27:19 368
2007.Oct.04 07:25:19 392
---------------------------------------

As you see, the difference between last(it's 368) and previous (392) was 368-392=-24 which is definitely < 0 But the trigger wasn't activated at the moments I marked red.

So, did I make any mistake or it's a known problem?
Thanks in advance!

[Alexei]

Thanks for reporting this. It is registered as ZBX-108. I will keep you informed about any progress here.

[Alexei]

Fixed in the latest code. This problem existed for items of integer type only.