Platform: Windows 7 Ultimate 64bit.
ISP: Cox Cable
Type of Internet Connection: Fiber Optic
Internet Connection Speed: 31Mbps
Date & Time: Apr. 8, 2011 23:30 CST
Frequency: Random occurence
Character Name: Reika Shadowheart
Race: Miqo'te
World: Karnak
Class/Skill Rank: Thaumaturge R47
Physical Level: 50
Area and Coordinates: Ul'dah Adventurer's Guild
Party or Solo: Pary, 8 members
NPC Name: N/A
Monster Name: Blotched Mongrel (and every other monster)
In-Game Time: 1100
Steps:
-Me and party engage Blotched mongrel. It's name turns red to indicate it is enguaged
-We proceed to kill it, after words, no txt is displayed on the screen for EXP or SP gain, but it is still shown on the SP bar that SP was gained. Other times, it just shows EXP gained but no SP gained, but SP is still actually gained.

It is a random occurrence with all monsters. Even tho EXP and SP is actually gained, it sometimes doesn't show in the chat box.