OK - because a day without bug report is a day losed, I can report something today.
Everytime when the game is started at cs_bigbrother_beta1 map server is crashed after few minutes. For sure I played this map with PB2.5.
This moment I can say now nothing more - when, why etc. But I made some screenshots with windows messages "HLDS made an illegal operation..." and stacks. I hope this can help for coders.
Tested with latest sPlOrYgOn's beta release, Metamod1.17, CS1.5 Windows98SE (dedicated and listenserver).
When I'll find time I'll try this map with some older version of podbot_mm.dll.