The phonology of Malay has a rule of vowel harmony: if the vowel in the first syllable of a bisyllabic word is /e/, then the second syllable can have /e/ or /o/ but not /i/ or /u/. (The vowels must agree in height - see here.) However, even official media channels sometimes get the spelling wrong.
Here is a screen shot of a news report from the Singapore TV station, Suria, of 19 December 2012, about money that is paid out by the organisation Pertapis:
The second word is dicedok ('ladled out'). But note that it is spelled deceduk instead of the expected dicedok.